Question 1: Palette 1/210

Allen MCQ

Oxygen which is liberated during photosynthesis comes from -

A

Carbon dioxide

B

Water

C

Chlorophyll

D

Phosphoglyceric acid

Question 2: Palette 2/210

Allen MCQ

In which of the following process, the light energy is converted into chemical energy?

A

Digestive action

B

Respiration

C

Photosynthesis

D

Fermentation

Question 3: Palette 3/210

Allen MCQ

During photosynthesis the oxygen in glucose comes from :-

A

Water

B

Carbon dioxide

C

O₂ in air

D

Both from water and CO₂

Question 4: Palette 4/210

Allen MCQ

Name the scientist, who first pointed out by bell jar experiment that plants purify foul air:

A

Willstatter

B

Robert Hooke

C

Priestley

D

Jean Senebier

Question 5: Palette 5/210

Allen MCQ

Moll's half leaf experiment explains that :-

A

Carbon dioxide is essential for photosynthesis

B

Chlorophyll and water are necessary for photosynthesis

C

Light and water are essential for photosynthesis

D

All the above are correct

Question 6: Palette 6/210

Allen MCQ

Oxygen during photosynthesis comes from water was proved with the help of O¹8 experiment by:-

A

Ruben and Kamen

B

Hill

C

Warburg

D

Blackman

Question 7: Palette 7/210

Allen MCQ

Name the scientist who pointed out the importance of different wavelengths of light using a green algae and aerobic bacteria :-

A

Priestley

B

Ingenhousz

C

K.V. Thimann

D

Englemann

Question 8: Palette 8/210

Allen MCQ

Photosynthesis is :-

A

Oxidative, exergonic, catabolic

B

Redox-reaction, endergonic, anabolic

C

Reductive, exergonic, anabolic

D

Reductive, endergonic, catabolic

Question 9: Palette 9/210

Allen MCQ

The significance of light and green part in photosynthesis was discovered by :-

A

Priestley

B

Ingenhousz

C

Englemann

D

Blackman

Question 10: Palette 10/210

Allen MCQ

Which one of the following pigment does not occur in the chloroplast?

A

Carotene

B

Xanthophyll

C

Chlorophyll 'b'

D

Anthocyanin

Question 11: Palette 11/210

Allen MCQ

Chlorophyll contains :

A

Fe

B

Mg

C

K

D

Mn

Question 12: Palette 12/210

Allen MCQ

Which pigment is water soluble?

A

Chlorophyll

B

Carotene

C

Anthocyanin

D

XanthophylI

Question 13: Palette 13/210

Allen MCQ

Chlorophyll is present :

A

In the grana of chloroplasts

B

On the surface of chloroplasts

C

Dispersed through out the chloroplasts

D

In the stroma of chloroplasts

Question 14: Palette 14/210

Allen MCQ

Which colour of light gives maximum absorption peak by chlorophyll 'a'?

A

Blue light

B

Green light

C

Violet light

D

Red light

Question 15: Palette 15/210

Allen MCQ

The number of pigment molecules in photosystem is:

A

250 - 400

B

300 - 900

C

500 - 600

D

50 -100

Question 16: Palette 16/210

Allen MCQ

The main difference between chlorophyll 'a' and 'b' is:

A

Chlorophyll 'a' is a linear chain compound and 'b' is branched chain

B

Chlorophyll 'a' has no ${ \mathsf { M } } { \mathsf { g } } ^ { + }$ ion in center of molecule

C

In chlorophyll 'a' there is -CH₃ group whereas in 'b' it is -CHO group

D

All of the above

Question 17: Palette 17/210

Allen MCQ

Basic common structure of all chlorophyll comprises of :-

A

Cytochrome system

B

Flavoproteins

C

Porphyrin system

D

Plastocyanin

Question 18: Palette 18/210

Allen MCQ

What is the by product of bacterial photosynthesis?

A

$\mathsf { O } _ { 2 }$

B

$\mathsf { C O } _ { 2 }$

C

S

D

$H _ { 2 } S$

Question 19: Palette 19/210

Allen MCQ

Universal chlorophyll is :-

A

Chl - 'a'

B

Chl - 'b'

C

Chl - 'c'

D

Chl - 'e'

Question 20: Palette 20/210

Allen MCQ

Which one of the following is precursor of protochlorophyll?

A

Acetyl COA

B

Succinyl COA

C

Oxaloacetic acid

D

α-ketoglutarate

Question 21: Palette 21/210

Allen MCQ

Photosynthesis is an oxidation reduction process, the materials that is oxidised is :-

A

$\mathsf { C O } _ { 2 }$

B

NADP

C

$H _ { 2 } O$

D

PGA

Question 22: Palette 22/210

Allen MCQ

During photosynthesis :-

A

Water is reduced & CO₂ is oxidized

B

$\mathsf { C O } _ { 2 }$ is reduced & water is oxidized

C

Both $\mathsf { C O } _ { 2 }$ & water get reduced

D

Both $\mathsf { C O } _ { 2 }$ & water get oxidized

Question 23: Palette 23/210

Allen MCQ

Which photosynthetic pigment converts nascent oxygen to molecular oxygen ?

A

Chlorophyll-a

B

Carotenoids

C

Phycobilins

D

Chlorophyll-b

Question 24: Palette 24/210

Allen MCQ

Hill reaction occurs in :-

A

High altitude plants only

B

Total darkness

C

Presence of ferricyanide

D

Absence of water

Question 25: Palette 25/210

Allen MCQ

Photosynthetically active radiation (PAR) represents the following range of wavelength.

A

400 - 700 nm

B

500 - 600 nm

C

450 - 950 nm

D

340 - 450 nm

Question 26: Palette 26/210

Allen MCQ

Which one of the following categories of organisms do not evolve oxygen during photosynthesis ?

A

Red algae

B

Photosynthetic bacteria

C

C₄-plants with Kranz anatomy

D

Blue green algae

Question 27: Palette 27/210

Allen MCQ

The site for dark reaction of photosynthesis is:

A

Stroma

B

Grana thylakoid

C

Intergranal thylakoid

D

Mitochondria

Question 28: Palette 28/210

Allen MCQ

Discovery of Emerson effect has shown the existence of :-

A

Two distinct photosystems

B

Light and dark reactions of photosynthesis

C

Photophosphorylation

D

Photorespiration

Question 29: Palette 29/210

Allen MCQ

Wavelength of light responsible for Emerson's enhancement effect :-

A

only 680 nm

B

only 680 nm↓

C

infra red wavelength

D

Both 680 nm and more than 680 nm

Question 30: Palette 30/210

Allen MCQ

The process of photo-phosphorylation take place in :-

A

Chloroplast

B

Ribosomes

C

Mitochondria

D

Cell-wall

Question 31: Palette 31/210

Allen MCQ

In pigment system-I, reaction centre is :-

A

P-600

B

P-680

C

P-700

D

P-720

Question 32: Palette 32/210

Allen MCQ

Which of the following is the site of photolysis of water ?

A

Stroma of chloroplast

B

Cristae of chloroplast

C

Ribosome of chloroplast

D

Lumen surface of thylakoid membrane

Question 33: Palette 33/210

Allen MCQ

The first step in photosynthesis is :-

A

Joining of three carbon atoms to from glucose

B

Formation of ATP

C

lonization of water

D

Excitement of an electron of chlorophyll by a photon of light.

Question 34: Palette 34/210

Allen MCQ

The product of light reaction is :-

A

ATP & NADPH(H⁺)

B

NADPH(H⁺) & glucose

C

Only ATP

D

O₂ & glucose

Question 35: Palette 35/210

Allen MCQ

Which one of the following concerns with photophosphorylation ?

A

$A D P + A M P \xrightarrow { \mathsf { L i g h t } } A T P$

B

ADP + Organic PO₄ Light→ ATP

C

ADP + Inorganic $P O _ { 4 } \xrightarrow { \mathsf { L i g h t } } \mathsf { A T P }$

D

AMP + Inorganic $P O _ { 4 } \xrightarrow { \mathsf { L i g h t } } \mathsf { A T P }$ BPP037

Question 36: Palette 36/210

Allen MCQ

During photochemical reaction of photosynthesis.

A

liberation of $\mathsf { O } _ { 2 }$ takes place

B

Formation of ATP and $N \mathsf { A D P H } _ { 2 }$ take place

C

Liberation of $\begin{array} { r } { { { 0 } _ { 2 } } , } \end{array}$ formation of ATP, and NADPH₂ takes place

D

Assimilation of $\complement 0 _ { 2 }$ takes place

Question 37: Palette 37/210

Allen MCQ

Which of the following is excited molecule during photosynthesis ?

A

Chlorophyll

B

Oxygen

C

Carbon dioxide

D

Water

Question 38: Palette 38/210

Allen MCQ

During splitting of ${ \sf H } _ { 2 } { \sf O } ,$ H⁺ is ultimately captured by :-

A

Chlorophyll

B

NADP

C

$\mathsf { O } _ { 2 }$

D

Cytochrome

Question 39: Palette 39/210

Allen MCQ

At the time of splitting of ${ \sf H } _ { 2 } { \sf O } ,$ which initially captures the electron :-

A

Chlorophyll

B

NADP

C

OH−

D

Cytochrome

Question 40: Palette 40/210

Allen MCQ

In cyclic photophosphorylation which one of the following is formed?

A

NADP & ATP

B

ATP

C

NADH + H⁺ and ${ { 0 } _ { 2 } }$

D

NADPH + H⁺, ATP and $\mathsf { O } _ { 2 }$

Question 41: Palette 41/210

Allen MCQ

Photooxidation of water in photosynthesis is associated with :-

A

Cytochrome b₆

B

Pigment system—I

C

Pigment system-II

D

Plastocyanin

Question 42: Palette 42/210

Allen MCQ

During ATP synthesis electron pass through:-

A

Water

B

Cytochromes

C

$\mathsf { O } _ { 2 }$

D

$\mathsf { C O } _ { 2 }$

Question 43: Palette 43/210

Allen MCQ

Which pigment system immediately donates $\mathsf { e } ^ { - }$ for the reduction of NADP?

A

$\mathsf { P S - } | |$

B

PS-I

C

$\mathsf { C O } _ { 2 }$

D

Plastoquinone

Question 44: Palette 44/210

Allen MCQ

Which element are presents in OEC (Oxygen evolving complex) ?

A

$\mathsf { M n } ^ { + + }$

B

$\subset \ulcorner$

C

$\mathsf { C a ^ { + + } }$

D

AIl

Question 45: Palette 45/210

Allen MCQ

The path of $\mathsf { C O } _ { 2 }$ in the dark reactions of photosynthesis was successfully traced by the use of the :-

A

${ O _ { 2 } } ^ { 1 8 }$

B

$\mathsf { C } ^ { 1 4 } \mathsf { O } _ { 2 }$

C

$\mathsf { P } ^ { 3 2 }$

D

$\mathsf { X } - \mathsf { r a y s }$

Question 46: Palette 46/210

Allen MCQ

Which of the following protein is most abundant on the earth?

A

Catalase

B

RuBisCO

C

Amylase

D

Pepsin

Question 47: Palette 47/210

Allen MCQ

The function of ATP in photosynthesis is the transfer of energy from the :-

A

Dark reaction to the light reaction

B

Light reaction to the dark reaction

C

Chloroplasts to mitochondria

D

Mitochondria to chloroplasts

Question 48: Palette 48/210

Allen MCQ

In photosynthesis, hydrogen is transferred from the light reactions to dark reactions by:-

A

NAD

B

DNA

C

ATP

D

NADP

Question 49: Palette 49/210

Allen MCQ

NADPH(H⁺) is also called :-

A

Real power

B

Oxidising agent

C

Power house of energy

D

Reducing power

Question 50: Palette 50/210

Allen MCQ

Fixation of 1 CO₂ requires :-

A

6NADPH(H⁺) & 3ATP

B

2NADPH(H⁺) & 3ATP

C

4NADPH(H⁺) & 3ATP

D

5NADPH(H⁺) & 3ATP

Question 51: Palette 51/210

Allen MCQ

Connecting link between light phase and dark phase of photosynthesis, is :-

A

Only ATP

B

Only NADPH(H⁺)

C

Only NADH + H⁺

D

ATP & NADPH(H⁺)

Question 52: Palette 52/210

Allen MCQ

In photosynthesis CO₂ combines with :-

A

RUBP

B

ATP

C

ADP

D

PGA

Question 53: Palette 53/210

Allen MCQ

During the dark reactions of photosynthesis:—

A

Water splits

B

CO₂ is reduced to organic compounds

C

Chlorophyll is activated

D

Stable C₆-sugar is broken into three carbon sugars

Question 54: Palette 54/210

Allen MCQ

The enzyme that fixes atmospheric CO₂ in C₄ plants is :-

A

PEP carboxylase

B

Hexokinase

C

RUBP oxygenase

D

Hydrogenase

Question 55: Palette 55/210

Allen MCQ

During photosynthesis when PGA is changed intophosphoglyceraldehyde which of the following reaction occur?

A

Oxidation

B

Reduction

C

Electrolysis

D

Hydrolysis

Question 56: Palette 56/210

Allen MCQ

Carbon refixation in C4 plants occurs in chloroplasts of :-

A

Palisade tissue

B

Spongy Mesophyll

C

Bundle sheath cells

D

Guard cells

Question 57: Palette 57/210

Allen MCQ

Tropical plants like sugarcane show high efficiency of CO₂ fixation because of :-

A

Calvin cycle

B

Hatch - Slack cycle

C

Cyclic photophosphorylation

D

TCA Cycle

Question 58: Palette 58/210

Allen MCQ

"Kranz" type of anatomy is found in :-

A

C4 plant

B

C3 plant

C

Succulent plants

D

All of the above

Question 59: Palette 59/210

Allen MCQ

Which of the following is C₄ plants ?

A

Maize

B

Atriplex

C

Sugarcane

D

All of the above

Question 60: Palette 60/210

Allen MCQ

Which pair is wrong?

A

C₃ plant - maize

B

Calvin cycle - PGA

C

Hatch and Slack cycle - Maize

D

C₄-plant - Kranz Anatomy

Question 61: Palette 61/210

Allen MCQ

C4 plants are found among :-

A

Only Gramineae family

B

Only monocots

C

Only dicots

D

Monocots as well as dicots

Question 62: Palette 62/210

Allen MCQ

In case of $\mathsf { C } _ { 4 }$ pathway, the first step is :-

A

$\mathsf { C O } _ { 2 }$ combines with RUBP

B

$\mathsf { C O } _ { 2 }$ combines with PGA

C

$\mathsf { C O } _ { 2 }$ combines with PEP

D

$\mathsf { C O } _ { 2 }$ combines with PGAL

Question 63: Palette 63/210

Allen MCQ

In dark reaction, first reaction is the :-

A

Carboxylation

B

Decarboxylation

C

Dehydrogenation

D

Deamination

Question 64: Palette 64/210

Allen MCQ

Number of ATP molecules required for regeneration phase of RUBP during synthesis of 1 glucose molecule :-

A

6

B

12

C

18

D

30

Question 65: Palette 65/210

Allen MCQ

Isotopes employed to study the process of photosynthesis reaction.

A

$\mathsf { S } ^ { 3 5 }$ and ${ \mathsf P } ^ { 3 2 }$

B

${ \mathsf { C } } ^ { 1 4 }$ and ${ \boldsymbol { 0 } } ^ { 1 8 }$

C

${ \mathsf { N } } ^ { 1 4 }$ and ${ \mathsf { C o } } ^ { 6 0 }$

D

${ \mathsf { N } } ^ { 1 4 }$ and ${ 0 ^ { 1 8 } }$

Question 66: Palette 66/210

Allen MCQ

Chloroplast is present in bundle sheath cells of :-

A

${ \mathsf { C } } _ { 3 }$ plants

B

C4 plants

C

CAM plants

D

Photorespiring plants

Question 67: Palette 67/210

Allen MCQ

CO₂ is accepted by RUBP in C₄ plants in :-

A

Mesophyll cells

B

Bundle sheath cells

C

Stomatal guard cells

D

Epidermal cells

Question 68: Palette 68/210

Allen MCQ

Bundle sheath chloroplasts of $\mathsf { C } _ { 4 }$ plant are :

A

Large & agranal

B

Large & granal

C

Small & agranal

D

Small & granal

Question 69: Palette 69/210

Allen MCQ

In addition to the 12 molecules of NADPH(H⁺), the energy required for the synthesis of one mole of hexose by ${ \mathsf { C } } _ { 3 }$ and $\mathsf { C } _ { 4 }$ pathway is -

A

18 & 18 molecules of ATP respectively

B

30 & 30 molecules of ATP respectively

C

18 & 30 molecules of ATP respectively

D

30 & 18 molecules of ATP respectively

Question 70: Palette 70/210

Allen MCQ

How many Calvin cycles would generate one molecule of glucose/hexose ?

A

One cycle

B

Three cycles

C

Six cycles

D

Twelve cycles

Question 71: Palette 71/210

Allen MCQ

CAM - plants are :-

A

Succulent xerophyte

B

Hydrophytes

C

Epiphytes

D

Mesophytes

Question 72: Palette 72/210

Allen MCQ

The first stable product of Calvin cycle and Hatch stack pathway are :-

A

4-C and 3-C compounds respectively

B

4-C and 6-C compounds respectively

C

3-C and 4-C compounds respectively

D

5-C and 4-C compounds respectively

Question 73: Palette 73/210

Allen MCQ

Which of the following was used during discovery of Calvin cycle ?

A

Spirogyra

B

Volvox

C

Chlamydomonas

D

Chlorella

Question 74: Palette 74/210

Allen MCQ

Which one of the following have high $\complement 0 _ { 2 }$ compensation point ?

A

C₂ plants

B

C₃ plants

C

$\mathsf { C } _ { 4 }$ plants

D

CAM plants

Question 75: Palette 75/210

Allen MCQ

First stable product of Photorespiration is :-

A

PGAL

B

Glycerate

C

Glycine

D

Phosphoglycolate

Question 76: Palette 76/210

Allen MCQ

Photorespiration is favoured by :-

A

Low light intensity

B

Low O₂ & high CO₂

C

Low temperature

D

High $\mathsf { O } _ { 2 }$ & Low $\mathsf { C O } _ { 2 }$

Question 77: Palette 77/210

Allen MCQ

What is C₂ - Cycle ?

A

Glycolate cycle

B

Calvin cycle

C

Kreb's cycle

D

TCA - cycle

Question 78: Palette 78/210

Allen MCQ

Compensation point means :-

A

When the rate of photosynthesis is equal to rate of respiration

B

When there is neither photosynthesis nor respiration

C

When the entire food manufactured in photosynthesis remains unutilized

D

When availability of water equalise with necessity of water.

Question 79: Palette 79/210

Allen MCQ

What does not occur in photorespiration

A

Utilization of $\mathsf { O } _ { 2 }$

B

Production of $\mathsf { C O } _ { 2 }$

C

Synthesis of ATP

D

Use of ATP

Question 80: Palette 80/210

Allen MCQ

DCMU is an inhibitor of :-

A

PS-I

B

PS-II

C

Calvin cycle

D

Kreb's cycle

Question 81: Palette 81/210

Allen MCQ

Main factor which limits the rate of photosynthesis on a clear day is :-

A

Chlorophyll

B

Light

C

$\mathsf { C O } _ { 2 }$

D

Water

Question 82: Palette 82/210

Allen MCQ

Which one of the following is wrong in relation to photorespiration ?

A

It occurs in chloroplast

B

It occurs in day time only

C

It is a characteristic of $\mathsf { C } _ { 4 }$ plants

D

It is a characteristic of ${ \mathsf { C } } _ { 3 }$ plants

Question 83: Palette 83/210

Allen MCQ

The law of limiting factor for photosynthesis was given by :-

A

R. Hill

B

Krebs

C

Calvin

D

Blackman

Question 84: Palette 84/210

Allen MCQ

Anoxygenic photosynthesis is characteristic of-

A

Rhodospirillum

B

Spirogyra

C

Chlamydomonas

D

Ulva

Question 85: Palette 85/210

Allen MCQ

Chromatophores take part in: -

A

Respiration

B

Photosynthesis

C

Growth

D

Movement

Question 86: Palette 86/210

Allen MCQ

In photosynthesis, the light-independent reactions take place at :-

A

Stromal matrix

B

Thylakoid lumen

C

Photosystem-I

D

Photosystem-II

Question 87: Palette 87/210

Allen MCQ

Emerson's enhancement effect and red drop have been instrumental in the discovery of: -

A

Photophosphorylation and non-cyclic electron transport

B

Two photosystems operating simultaneously

C

Photophosphorylation and cyclic electron transport

D

Oxidative phosphorylation

Question 88: Palette 88/210

Allen MCQ

In a chloroplast the highest number of protons are found in :-

A

Stroma

B

Lumen of thylakoids

C

Inter membrane space

D

Antennae complex

Question 89: Palette 89/210

Allen MCQ

A plant in your garden avoids photorespiratory losses, has improved water use efficiency shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?

A

C3

B

C4

C

CAM

D

Nitrogen fixer

Question 90: Palette 90/210

Allen MCQ

The process which makes major difference between ${ \mathsf { C } } _ { 3 }$ and $\mathsf { C } _ { 4 }$ plants is: -

A

Photorespiration

B

Respiration

C

Glycolysis

D

Calvin cycle

Question 91: Palette 91/210

Allen MCQ

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

A

Increasing atmospheric $\complement 0 _ { 2 }$ concentration up to 0.05% can enhance $\complement 0 _ { 2 }$ fixation rate

B

${ \mathsf { C } } _ { 3 }$ plants respond to higher temperatures with enhanced photosynthesis while $\mathsf { C } _ { 4 }$ plants have much lower temperature optimum

C

Tomato is a greenhouse crop which can be grown in $\mathsf { C O } _ { 2 }$ - enriched atmosphere for higher yield

D

Light saturation for $\mathsf { C O } _ { 2 }$ fixation occurs at 10% of full sunlight

Question 92: Palette 92/210

Allen MCQ

Phosphonyl pyruvate (PEP) is the primary $\mathsf { C O } _ { 2 }$ acceptor in :

A

C4 plants

B

$\mathsf { C } _ { 2 }$ plants

C

C₃ and $\mathsf { C } _ { 4 }$ plants

D

${ \mathsf { C } } _ { 3 }$ plants

Question 93: Palette 93/210

Allen MCQ

Oxygen is not produced during photosynthesis by: -

A

Green Sulphur bacteria

B

Nostoc

C

Cycas

D

Chara

Question 94: Palette 94/210

Allen MCQ

Which of the following is not a product of light reaction of photosynthesis?

A

ATP

B

NADH

C

NADPH

D

Oxygen

Question 95: Palette 95/210

Allen MCQ

In Hatch and Slack pathway, the primary CO₂ acceptor is: -

A

Oxaloacetic acid

B

Phosphoglyceric acid

C

Phosphoenol pyruvate

D

RuBisCO

Question 96: Palette 96/210

Allen MCQ

One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of:

A

Violet and green light

B

Indigo and green light

C

Orange and yellow light

D

Blue and red light

Question 97: Palette 97/210

Allen MCQ

In light reaction, plastoquinone facilitates the transfer of electrons from :

A

PS-I to ATP synthase

B

PS-II to Cytb₆f complex

C

Cytb₆f complex to PS-I

D

PS-I to NADP⁺

Question 98: Palette 98/210

Allen MCQ

The oxygenation activity of RuBisCO enzyme in photorespiration leads to the formation of :-

A

1 molecule of 4 C compound and 1 molecule of 2 C compound.

B

2 molecules of 3 C compound

C

1 molecule of 3 C compound

D

1 molecule of 6 C compound

Question 99: Palette 99/210

Allen MCQ

During non-cyclic photophosphorylation, when electrons are lost from the reaction centre at PS-ll, what is the source which replaces these electrons?

A

Oxygen

B

Water

C

Carbon dioxide

D

Light

Question 100: Palette 100/210

Allen MCQ

Which of the following statements is incorrect?

A

RuBisCO is a bifunctional enzyme

B

In $\mathsf { C } _ { 4 }$ plants, the site of RuBisCO activity is mesophyll cell

C

The substrate molecule for RuBisCO activity is a 5-carbon compound

D

RuBisCO action requires ATP and NADPH BPP119

Question 101: Palette 101/210

Allen MCQ

The first stable product of $\mathsf { C O } _ { 2 }$ fixation in sorghum is :

A

Pyruvic acid

B

Oxaloacetic acid

C

Succinic acid

D

Phosphoglyceric acid

Question 102: Palette 102/210

Allen MCQ

Which of the following statements is incorrect?

A

Both ATP and NADPH + H⁺ are synthesizedduringnon-cyclic photophosphorylation.

B

Stroma lamellae have PS-I only and lack NADP reductase.

C

Grana lamellae have both PS-I and PS-II.

D

Cyclic photophosphorylation involves both PS-I and PS-II.

Question 103: Palette 103/210

Allen MCQ

In the plastid, the site of dark and light reaction is :-

A

Grana and stroma respectively

B

Grana and matrix respectively

C

Matrix and grana respectively

D

Stroma and grana respectively

Question 104: Palette 104/210

Allen MCQ

The maximum absorption of light by chlorophyll occurs in which region of the absorption spectrum.

A

Red and green

B

Yellow and green

C

Blue and red

D

Brown and red

Question 105: Palette 105/210

Allen MCQ

Non-cyclic photophosphorylation results in the formation of

A

ATP and NADH + H+

B

ATP only

C

ATP and NADPH + H⁺

D

ATP, ADP and NADH + H⁺

Question 106: Palette 106/210

Allen MCQ

Given below are two statements : Statement I: The primary CO₂ acceptor in C4 plants is phosphoenolpyruvate and is found in the mesophyll cells. Statement Il: Mesophyll cells of C4 plants lack RuBisCO enzyme. In the light of the above statements, choose the correct answer from the options given below :-

A

Both Statement I and Statement Il are incorrect.

B

Statement I is correct but Statement Il is incorrect.

C

Statement I is incorrect but Statement II is correct.

D

Both Statement I and Statement Il are correct.

Question 107: Palette 107/210

Allen MCQ

Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis? It involves :-

A

Breakdown of electron gradient.

B

Movement of protons across the membrane to the stroma.

C

Reduction of NADP to NADPH₂ on the stroma side of the membrane.

D

Breakdown of proton gradient.

Question 108: Palette 108/210

Allen MCQ

What is the role of large bundle sheath cells found around the vascular bundles in $\mathsf { C } _ { 4 }$ plants?

A

To increase the number of chloroplasts for the operation of Calvin cycle.

B

To enable the plant to tolerate high temperature.

C

To protect the vascular tissue from high light intensity.

D

To provide the site for photorespiratory pathway.

Question 109: Palette 109/210

Allen MCQ

When one CO₂ molecule is fixed as one molecule of triose phosphate, which of the following photochemically made, high energy chemical intermediates are used in the reduction phase?

A

1 ATP + 1 NADPH

B

1 ATP + 2 NADPH

C

2 ATP + 1 NADPH

D

2 ATP + 2 NADPH

Question 110: Palette 110/210

Allen Match the Columns

Match Column-I with Column-II.

Column-I	Column-II
(a) porins (b) leg haemoglobin (c) H+ accumulation (d) Respiration mitochondria	(i) Pink coloured nodules (ii) Lumen of thylakoid (iii) Amphibolic pathway (iv) Huge pores in outer membrane of

A

a−ii, b−i, c−iv, d-iii

B

a−iv, b−i, c−ii, d−iii

C

a−iii,b−iv,c−ii,d−i

D

a−ii, b−iv, c−i, d−iii

Question 111: Palette 111/210

Allen MCQ

Identify the correct statements regarding chemiosmotic hypothesis :
(a) Splitting of the water molecule takes place on the inner side of the membrane.
(b) Protons accumulate within the lumen of the thylakoids.
(c) Primary acceptor of electron transfers the electrons to an electron carrier.
(d) NADP reductase enzyme is located on the stroma side of the membrane.
(e) Protons increase in number in stroma.

A

(a),(b) and (e)

B

(a), (b) and (d)

C

(b), (c) and (d)

D

(b), (c) and (e)

Question 112: Palette 112/210

Allen MCQ

How many ATP and NADPH₂ are required for the synthesis of one molecule of Glucose during Calvin cycle ?

A

18 ATP and 12 NADPH₂

B

12 ATP and 16 NADPH₂

C

18 ATP and 16 NADPH₂

D

12 ATP and 12 NADPH₂

Question 113: Palette 113/210

Allen MCQ

Which micronutrient is required for splitting of water molecule during photosynthesis ?

A

Molybdenum

B

Magnesium

C

Copper

D

Manganese

Question 114: Palette 114/210

Allen MCQ

The reaction centre in PS-II has an absorption maxima at :-

A

700 nm

B

660 nm

C

780 nm

D

680 nm

Question 115: Palette 115/210

Allen MCQ

Which of the following combinations is required for chemiosmosis?

A

membrane, proton pump, proton gradient, NADP synthase

B

proton pump, electron gradient, ATP synthase

C

proton pump, electron gradient, NADP synthase

D

membrane, proton pump, proton gradient, ATP synthase

Question 116: Palette 116/210

Allen Match the Columns

Match Column-I with Column-II.

Column-I	Column-II
(a) chlorophyll a (b) chlorophyll b (c) xanthophyll (d) carotenoid	(i) yellow to yellow (ii) yellow green (iii) blue green (iv) yellow

A

a-iv, b-ii,c-iii,d-i

B

a-iv, b-i, c-iii,d-ii

C

a-ii, b-iii,c-i, d-iv

D

a-i, b-iv, c-ii, d-iii

Question 117: Palette 117/210

Allen MCQ

Given below are two statements. Statement I: RuBisCO is the most abundant enzyme in the world. Statement II : Photorespiration does not occur in C₄ plants. In the light of the above statements, choose the most appropriate answer from the options given below :-

A

Statement I is correct but Statement Il is incorrect.

B

Statement I is incorrect but Statement II is correct.

C

Both Statement I and Statement Il are correct.

D

Both Statement I and Statement Il are incorrect.

Question 118: Palette 118/210

Allen MCQ

Which out of the following statements is incorrect ?

A

Grana lamellae have both PS-I and PS-II

B

Cyclic photophosphorylation involves both PS-I and PS-II

C

Both ATP and NADPH + H⁺ are synthesisedduring non-cyclic photophosphorylation.

D

Stroma lamellae lack PS-II and NADP reductase

Question 119: Palette 119/210

Allen MCQ

Which of the following are required for the dark reaction of photosynthesis? A. Light B. Chlorophyll C. CO₂ D. ATP Choose the correct answers from the options given below :-

A

A, B and C only

B

B, C and D only

C

C, D and E only

D

D and E only

Question 120: Palette 120/210

Allen MCQ

How many molecules of ATP and NADPH are required for every molecule of CO₂ fixed in the Calvin cycle?

A

2 molecules of ATP and 3 molecules of NADPH.

B

2 molecules of ATP and 2 molecules of NADPH.

C

3 molecules of ATP and 3 molecules of NADPH.

D

3 molecules of ATP and 2 molecules of NADPH.

Question 121: Palette 121/210

Allen MCQ

Statement-I : In ${ \mathsf { C } } _ { 3 }$ plants, some ${ { 0 } _ { 2 } }$ binds to RuBisCO, hence $\mathsf { C O } _ { 2 }$ fixation is decreased. Statement-II : In $\mathsf { C } _ { 4 }$ plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespiration. In the light of the above statements, choose the correct answer from the options given below :

A

Both Statement I and Statement Il are true

B

Both Statement I and Statement Il are false

C

Statement I is true but Statement Il is false

D

Statement I is false but Statement Il is true BPP210

Question 122: Palette 122/210

Allen MCQ

Which of the following are required for the light reaction of Photosynthesis?
(A) $\mathsf { C O } _ { 2 }$
(B) $\mathsf { O } _ { 2 }$
(C) $H _ { 2 } O$
(D) Chlorophyll

A

A, C, D and E only

B

C, D and E only

C

A and B only

D

A, C and E only

Question 123: Palette 123/210

Allen MCQ

Which one of the following products diffuses out of chloroplast during photosynthesis?

A

$\mathsf { A D P }$

B

NADPH

C

$\mathsf { O } _ { 2 }$

D

ATP

Question 124: Palette 124/210

Allen MCQ

Observe the given figure. Identify the different stages labelled with alphabets by selecting the correct option.

A

A-Carboxylation, B-Regeneration C-Reduction

B

A- Reduction, B-Decarboxylation C-Regeneration

C

A-Carboxylation, B-Reduction, C-Regeneration

D

A-Reduction, B-Carboxylation, C-Regeneration

Question 125: Palette 125/210

Allen MCQ

"Only green part of the plants could release oxygen" this is shown by -

A

Priestley

B

Moll

C

Ingenhousz

D

Julius Van Sachs

Question 126: Palette 126/210

Allen MCQ

In Calvin cycle which step involve utilisation of 2 molecules of ATP for phosphorylation and two of NADPH₂ per $\mathsf { C O } _ { 2 }$ molecule fixed?

A

Regeneration

B

Carboxylation

C

Reduction

D

All of above

Question 127: Palette 127/210

Allen MCQ

Which character make C4 plants special ?

A

Special type of leaf anatomy

B

They can tolerate high temperature

C

Show response to high light intensities

D

All of the above

Question 128: Palette 128/210

Allen MCQ

Most abundant enzyme in the world is -

A

Collagen

B

RuBisCO

C

PEPcase

D

Pyruvate dikinase DDD1:

Question 129: Palette 129/210

Allen MCQ

For every $\mathsf { C O } _ { 2 }$ molecule entering the Calvin cycle, required energy is :-

A

3 ATP and 2 NADPH

B

2 ATP and 3 NADPH

C

3 ATP and 3 NADPH

D

2 ATP and 2 NADPH

Question 130: Palette 130/210

Allen MCQ

In $\mathsf { C } _ { 4 }$ plants, bundle sheath cells are characterised by :-

A

Large number of chloroplasts

B

Thick walls impervious to gaseous exchange

C

No intercellular spaces

D

All the above

Question 131: Palette 131/210

Allen MCQ

In $\mathsf { C } _ { 4 }$ plants photorespiration does not occur, due to:-

A

Presence of RuBisCO enzyme

B

Presence of high light intensity

C

Increased concentration of $\mathsf { C O } _ { 2 }$ at RuBisCO enzyme site

D

Presence of bundle sheath cells.

Question 132: Palette 132/210

Allen MCQ

In photosynthesis during ATP formation accumulation of protons occurs :-

A

in lumen of thylakoid

B

in stroma of chloroplast

C

in periplastidial space

D

at outer surface of thylakoid

Question 133: Palette 133/210

Allen MCQ

By using the bell jar, which of the following showed that sunlight is essential to plant process that purifies the air?

A

Joseph priestley

B

Julius Von Sachs

C

T.W. Engelmann

D

Jan Ingenhousz

Question 134: Palette 134/210

Allen MCQ

Radioisotopic technique was used to prove some facts about :-

A

Light reaction of photosynthesis

B

Biosynthetic phase of photosynthesis

C

Both (1) and (2)

D

Different shapes of chloroplasts in plants

Question 135: Palette 135/210

Allen MCQ

Represented below is the graph showing action spectrum of photosynthesis superimposed on absorption spectrum of chlorophyll $\ " a \ " .$ Which one of the following is correct for this?

A

There is a complete one to one overlap between the absorption and action spectrum

B

By this overlapping it can be concluded that chlorophyll 'a' is the chief pigment of photosynthesis

C

This overlapping shows that only chlorophyll 'a' absorb the entire light energy

D

These graphs show that photosynthesis occurs only in the wavelengths of blue and red light

Question 136: Palette 136/210

Allen MCQ

The plants with Hatch and Slack pathway are adapted to :-

A

Humid temperate regions

B

Dry temperate regions

C

Humid tropical regions

D

Dry tropical regions

Question 137: Palette 137/210

Allen MCQ

Which of the following is correct?

A

The ${ \mathsf { C } } _ { 3 }$ and $\mathsf { C } _ { 4 }$ plants respond similarly to $\mathsf { C O } _ { 2 }$ concentrations.

B

At low light conditions $\mathsf { C } _ { 4 }$ plants show increase in the rates of photosynthesis.

C

$\mathsf { C } _ { 4 }$ plants not respond to high temperature.

D

The ${ \mathsf { C } } _ { 3 }$ and $\mathsf { C } _ { 4 }$ plants respond differently to $\mathsf { C O } _ { 2 }$ concentrations.

Question 138: Palette 138/210

Allen MCQ

Word dark reaction for biosynthetic phase of photosynthesis is misnomer word because:

A

Dark reaction occur during dark

B

Dark reaction occur during day

C

Dark reaction is completely free from light

D

Dark reaction occur during short dark intervals

Question 139: Palette 139/210

Allen MCQ

Photosynthetic photosystem is consist of :-

A

Reaction centre only

B

LHC only

C

Both LHC & reaction centre

D

Proteins only

Question 140: Palette 140/210

Allen MCQ

In grana lamellae, presence of which of the following specify that 'Z' scheme found only in grana lamellae?

A

PS-I, PS-II

B

PS-II & NADP reductase

C

PS-I & NADP reductase

D

$\mathsf { M g } ^ { + + }$

Question 141: Palette 141/210

Allen MCQ

An elegant experiment with an aquatic plant showed that in bright sunlight, small bubbles were formed around the green parts while in the dark they did not. It was done by :-

A

Jan Ingenhousz

B

Van Sachs

C

Priestley

D

Van Niel

Question 142: Palette 142/210

Allen MCQ

How many ATP are required for regeneration of RUBP in one Calvin cycle?

A

6 ATP

B

1 ATP

C

3 ATP

D

12 ATP

Question 143: Palette 143/210

Allen MCQ

Based on his studies of purple & green bacteriawhodemonstrated that photosynthesis is essentially a light dependent reaction in which hydrogen from a suitable oxidisable compound reduces CO2 to carbohydrates?

A

Van Niel

B

Von Sachs

C

Calvin

D

Priestley

Question 144: Palette 144/210

Allen MCQ

Which of following is correct about dark reaction?

A

It is not directly light driven but are dependent on products of light reaction (ATP & NADPH)

B

It occurs in stroma of chloroplast by enzymatic reactions

C

Both 1 & 2

D

It occurs in stroma lamellae

Question 145: Palette 145/210

Allen MCQ

Which of the following is most crucial step of Calvin cycle?

A

Carboxylation

B

Reduction

C

Regeneration

D

Glycolytic reversal

Question 146: Palette 146/210

Allen MCQ

Find out the correct match from the following table :- (i) photochemical phase – photosynthesis – oxygen release (ii) paper chromatography – chlorophyll 'b' – yello orange (iii) carotenoids – chief pigment – red light absorption

A

i only

B

i and ii

C

iii only

D

ii and iii

Question 147: Palette 147/210

Allen MCQ

During photosynthesis, plants mainly utilise the red and blue regions of visible spectrum, for the first time it was concluded by :

A

Jan Ingenhousz

B

Joseph Priestley

C

T.W. Engelmann

D

Cornelius Van Niel

Question 148: Palette 148/210

Allen MCQ

Which of the following conclusions regarding photosynthesis was proved by using radioisotopic techniques?

A

Light is essential

B

O₂ comes from H₂O and not from CO₂

C

Glucose is stored as starch

D

Exchange of gases with environment

Question 149: Palette 149/210

Allen MCQ

The dark reactions of the photosynthesis :

A

occur in darkness

B

are not light dependent

C

are not directly light driven

D

occur in membrane system of chloroplast

Question 150: Palette 150/210

Allen MCQ

Electrons from which of following reduces NADP⁺ to NADPH + H⁺ during Z-scheme of photosynthesis?

A

photosystem-I

B

water

C

carbon dioxide

D

photosystem-II

Question 151: Palette 151/210

Allen MCQ

During photosynthesis the stroma lamellae of chloroplast could perform:

A

the process of dark reaction in which ATP utilised

B

the process of light reaction which produce NADPH + H⁺

C

the process of dark reaction which utilise NADPH + H⁺

D

the process of light reaction which produce ATP

Question 152: Palette 152/210

Allen MCQ

Which of the following statements are correct regarding synthesis of ATP in chloroplast during photosynthesis?
(A) Splitting of water in stroma helps in creation of proton gradient
(B) Cytochrome complex helps in the release of protons in the lumen of thylakoid by accepting electrons from hydrogen carrier
(C) Movement of protons across the membrane to the stroma through the F₀ of the ATPase is coupled with ATP synthesis
(D) Reduction of NADP⁺ to NADPH + H⁺ is also a cause for creation of proton gradient

A

All statements are correct

B

C and D

C

A and B

D

B, C and D

Question 153: Palette 153/210

Allen MCQ

What is the correct ratio of ATP utilisation in steps of Calvin cycle?

A

Reduction : Regeneration :: 1 : 1

B

Reduction : Regeneration :: 2 : 1

C

Reduction : Regeneration :: 2 : 2

D

Reduction : Regeneration :: 1 : 2

Question 154: Palette 154/210

Allen MCQ

The cells of C₄ plants those are rich in RuBisCO enzyme, also have which of the following characteristic(s)?

A

Intercellular spaces absent

B

Thick walls impervious to gaseous exchange

C

Large number of chloroplast

D

All of the above

Question 155: Palette 155/210

Allen MCQ

The productivity is better in C₄ plants because:

A

They increase the intracellular concentration of CO₂ in mesophyll cells.

B

In these plants RuBisCO has much greater affinity for O₂ than for CO₂.

C

These plants can prevent competitive binding phenomena related to RuBisCO.

D

These plants minimise the carboxylase activity of RuBisCO.

Question 156: Palette 156/210

Allen MCQ

C₃ plants respond to higher CO₂ concentration by showing increased rates of photosynthesis because:

A

Current availability of CO₂ levels is limiting to the C₃ plants.

B

C₃ plants show saturation at about 360 μL L⁻¹ concentration of CO₂.

C

These plants respond to high CO₂ concentration even in low light conditions.

D

In these plants RuBisCO shows only carboxylation.

Question 157: Palette 157/210

Allen MCQ

$2 H _ { 2 } A + C O _ { 2 } \xrightarrow [ ] { } 2 A + C H _ { 2 } O + H _ { 2 }$ in this given equation H₂A represents to :

A

Suitable reducible compounds

B

Suitable oxidisable compound

C

Suitable buffer

D

Both 1 and 2

Question 158: Palette 158/210

Allen MCQ

The membrane system of chloroplast is responsible for

A

Trapping the light energy

B

Synthesis of ATP & NADPH

C

Enzymatic reactions for $\mathsf { C O } _ { 2 }$ incorporation

D

Both 1 and 2

Question 159: Palette 159/210

Allen MCQ

How does PS-II supply electrons continuously?

A

By removing electrons from photon

B

By removing electrons from $H _ { 2 } O$

C

By removing electrons from $\complement \mathsf { O } _ { 2 }$

D

By removing electrons from constituent carotenoids

Question 160: Palette 160/210

Allen MCQ

Which of the following is not always required for chemiosmosis ?

A

Membrane

B

Proton pump

C

OEC

D

ATP synthase

Question 161: Palette 161/210

Allen MCQ

Classification of biosynthetic phase of dark reaction as C₃ & C₄ is primarily based on.

A

Initial $\mathsf { C O } _ { 2 }$ fixation

B

Final $\mathsf { C O } _ { 2 }$ assimilation

C

First $\complement 0 _ { 2 }$ receptor

D

Number of ATP get consumed

Question 162: Palette 162/210

Allen MCQ

Which of the following is not special about $\mathsf { C } _ { 4 }$ plants?

A

Responsiveness to high light intensities

B

Lack of photorespiration

C

Greater productivity

D

Scotoactive stomata

Question 163: Palette 163/210

Allen MCQ

Which of the following is not a plant factor regulating photosynthesis ?

A

Age of leaf

B

Number of mesophyll cells

C

Atmospheric CO₂ concentration

D

Amount of chlorophyll

Question 164: Palette 164/210

Allen MCQ

CO₂ is the major limiting factor for photosynthesis because the concentration of $\mathsf { C O } _ { 2 }$ is very low in the atmosphere which is :-

A

between 0.01 and 0.02 per cent

B

between 0.02 and 0.03 per cent

C

between 0.03 and 0.04 per cent

D

between 0.06 and 0.07 per cent

Question 165: Palette 165/210

Allen MCQ

Which of the below processes are included
in the dark reaction of photosynthesis ?
(a) Formation of ATP and NADPH
(b) Use of ATP
(c) Reduction of PGA
(d) Water splitting
(e) Oxygen release

A

a, b and c

B

c and e

C

b and c

D

b, c and e

Question 166: Palette 166/210

Allen MCQ

Which of the following statements is correct in relation to the photosynthesis ?

A

It is the redox reaction during which reduction of $H _ { 2 } O$ and oxidation of $\mathsf { C O } _ { 2 }$ occurs

B

First of all it started in Chlorella

C

It converts light energy into chemical energy in night

D

Photosynthesis results in synthesis of sugar

Question 167: Palette 167/210

Allen MCQ

Regarding to given curves select the incorrect identification:
(A) (B) (C) (D)

A

A is the absorption spectrum of chl 'a'

B

B is the absorption spectrum of chl 'b'

C

C is the absorption spectrum of chl 'b'

D

D is the absorption spectrum of carotenoids.

Question 168: Palette 168/210

Allen MCQ

Which of the following step(s) of Calvin cycle require(s) both ATP and NADPH(H⁺) ?

A

Carboxylation and regeneration

B

Carboxylation

C

Reduction

D

Regeneration

Question 169: Palette 169/210

Allen MCQ

During photosynthesis, fixation of one $\mathsf { C O } _ { 2 }$ molecule in maize (A) and tomato (B) plant require :-

A

[A] - 5 ATP & 2 NADPH + 2H⁺ [B] - 3 ATP & 2 NADPH + 2H⁺

B

[A] - 3 ATP & 2 NADPH + 2H⁺ [B] - 3 ATP & 2 NADPH + 2H⁺

C

[A] - 2 ATP & 2 NADPH + 2H⁺ [B] - 3 ATP & 2 NADPH + 2H⁺

D

[A] - 30 ATP & 12 NADPH + 12H⁺ [B] - 18 ATP & 12 NADPH + 12H⁺

Question 170: Palette 170/210

Allen MCQ

How many carbons are present in first $\mathsf { C O } _ { 2 }$ acceptor in sorghum ?

A

5

B

4

C

3

D

2

Question 171: Palette 171/210

Allen MCQ

How many electrons are required to produce sufficient reducing power [NADPH + H⁺] to fix $6 C O _ { 2 }$ molecules to form glucose?

A

6 electrons

B

12 electrons

C

18 electrons

D

24 electrons

Question 172: Palette 172/210

Allen MCQ

Which of the following is correct for photosynthesis?

A

Use light energy to drive the synthesis of organic compounds

B

Primary source of all food on earth

C

Responsible for release of oxygen into the atmosphere

D

All of the above

Question 173: Palette 173/210

Allen MCQ

Studies by which of the following scientists showed that the green substance in plants is located in special bodies within plant cells?

A

T.W. Engelmann

B

Julius Von Sachs

C

Cornelius Van Niel

D

Joseph Priestley

Question 174: Palette 174/210

Allen MCQ

Action spectrum of photosynthesis roughly resembles the :-

A

Absorption spectrum of chlorophyll a

B

Absorption spectrum of chlorophyll b

C

Both 1 and 2

D

Absorption spectrum of carotenoids

Question 175: Palette 175/210

Allen MCQ

Which of the following is correct for the carbon reactions of photosynthesis ?

A

They occur in the membranous system of chloroplast

B

They are not light dependent

C

They synthesize sugar, ATP and NADPH

D

They are not directly light driven

Question 176: Palette 176/210

Allen MCQ

2H₂O → 4H⁺ + O₂ + 4e− Above reaction is a part of :-

A

Biosynthetic phase of photosynthesis in C3 plants

B

Z-Scheme of light reaction of photosynthesis

C

Hatch and slack pathway

D

Cyclic photophosphorylation

Question 177: Palette 177/210

Allen MCQ

Respectively during the creation of proton gradient and breakdown of proton gradient in chloroplast, protons move :-

A

from the stroma to cytoplasm and from the cytoplasm to stroma

B

from the cytoplasm to stroma and from stroma to cytoplasm

C

from the thylakoid lumen to stroma and from the stroma to thylakoid lumen

D

from the stroma to thylakoid lumen and from the thylakoid lumen to stroma

Question 178: Palette 178/210

Allen MCQ

In photosynthesis (Choose the correct one):

A

Phosphorylation can occur in light reaction only

B

Phosphorylation can occur in biosynthetic phase only

C

Phosphorylation can occur in both light reaction and biosynthetic phase

D

Phosphorylation not occurs at all

Question 179: Palette 179/210

Allen MCQ

Which of the following is a probable reason that why cyclic photophosphorylation takes place in photosynthesis?

A

To supply extra carbon dioxide to Calvin cycle

B

To utilise the light of wavelength of 680 nm which is not utilised in noncyclic photophosphorylation

C

To produce extra NADPH for biosynthetic phase

D

To meet the difference in number of ATP and NADPH

Question 180: Palette 180/210

Allen MCQ

C4 plants are special plants having Kranz anatomy in their leaves, here term 'Kranz' is a reflection of :-

A

Large number of chloroplasts in mesophyll cells.

B

Capacity to tolerate high temperatures.

C

Absence of chloroplasts in bundle sheath cells.

D

Ring like arrangement of cells.

Question 181: Palette 181/210

Allen MCQ

During the dark reaction of photosynthesis in C₄ plants (Choose the correct one) :-

A

Regeneration step occurs in mesophyll cell only.

B

Regeneration step occurs in bundle sheath cell only.

C

Regeneration steps occur in both mesophyll cell and bundle sheath cell.

D

There is no step of regeneration.

Question 182: Palette 182/210

Allen MCQ

RuBP+A RuBisCO → 2 × Phosphoglycerate RuBP+B RuBisCO → Phosphoglycerate + Phosphoglycolate Choose correct match for A and B from given options :-

A

A = NADPH, B = CO₂

B

A = O₂, B = CO₂

C

A = CO₂, B = O₂

D

A = CO₂, B = NADPH

Question 183: Palette 183/210

Allen MCQ

Before the discovery of RuBP as primary acceptor of $\mathsf { C O } _ { 2 }$ in Calvin cycle, it was believed that the primary acceptor would be:

A

6 carbon compound

B

2 carbon compound

C

3 carbon compound

D

4 carbon compound

Question 184: Palette 184/210

Allen MCQ

Glycolate accumulates in chloroplast at :-

A

Low temp

B

Low $\mathsf { C O } _ { 2 }$

C

Visible light illumination

D

High $\mathsf { C O } _ { 2 }$

Question 185: Palette 185/210

Allen MCQ

For the synthesis of one molecule of sucrose, how may ATP molecules are required in reduction step of Calvin cycle?

A

24 ATP

B

18 ATP

C

2 ATP

D

12 ATP

Question 186: Palette 186/210

Allen MCQ

Which of the following is the product of oxidation during photosynthesis ?

A

Carbon dioxide

B

Glucose

C

Water

D

Oxygen

Question 187: Palette 187/210

Allen MCQ

In Calvin cycle, $\mathsf { C O } _ { 2 }$ is fused with primary acceptor molecule to form 3C compound phosphoglycerate. If in this reaction $\mathsf { C O } _ { 2 }$ provides one carbon then how many carbons are present in primary acceptor molecule ?

A

Five carbons

B

Two carbons

C

Six carbons

D

Three carbons

Question 188: Palette 188/210

Allen MCQ

In photosynthesis, NADPH + H⁺ are oxidised in :-

A

Calvin cycle

B

Non-cyclic photophosphorylation

C

Cyclic photophosphorylation

D

Z-scheme

Question 189: Palette 189/210

Allen MCQ

Enzyme, which can catalyse both carboxylation and oxygenation of RuBP in the chloroplast, is not found in which of the following cells ?

A

Mesophyll cells of C₄ plants.

B

Mesophyll cells of C₃ plants.

C

Mesophyll cells of CAM plants.

D

Bundle sheath cells of C4 plants.

Question 190: Palette 190/210

Allen MCQ

The product of light reaction of photosynthesis, which is not common between cyclic and non-cyclic photophosphorylation and is not utilized in Calvin cycle, is :-

A

O₂

B

ATP

C

NADPH₂

D

O₂ and ATP

Question 191: Palette 191/210

Allen MCQ

Which phase of Calvin cycle does/do not use any energy rich molecule ?

A

Carboxylation only

B

Carboxylation and reduction

C

Reduction and regeneration

D

Reduction only

Question 192: Palette 192/210

Allen MCQ

The C4 plants differ from C3 plants with reference to the :-

A

Primary acceptor of $\mathsf { C O } _ { 2 }$ in dark reaction

B

Type of end product of photosynthesis.

C

Number of NADPH₂ that are consumed in synthesis of hexose.

D

Type of pigments involved in photosynthesis.

Question 193: Palette 193/210

Allen MCQ

The common feature between non-cyclic and cyclic photophosphorylation is :-

A

Proton gradient formation

B

Release of $\mathsf { O } _ { 2 }$

C

Formation of NADPH + H⁺

D

Photolysis of water

Question 194: Palette 194/210

Allen MCQ

The second acceptor of CO₂ in C4 plants is :-

A

PEP

B

Malate

C

Aspartate

D

RuBP

Question 195: Palette 195/210

Allen MCQ

In photosystem-I, the first electron acceptor is :-

A

Plastocyanin

B

An iron-sulphur protein

C

Ferredoxin

D

Cytochrome

Question 196: Palette 196/210

Allen MCQ

During photorespiration, the oxygen consuming reaction(s) occur in :-

A

Grana of chloroplasts and peroxisomes.

B

Stroma of chloroplasts.

C

Stroma of chloroplasts and mitochondria

D

Stroma of chloroplasts and peroxisomes

Question 197: Palette 197/210

Allen MCQ

The first acceptor of electrons from an excited chlorophyll molecule of photosystem Il is :-

A

Quinone

B

Cytochrome

C

Iron-sulphur protein

D

Ferredoxin

Question 198: Palette 198/210

Allen MCQ

In the leaves of C4 plants, malic acid formation during CO₂ fixation occurs in the cells of :-

A

Epidermis

B

Mesophyll

C

Bundle Sheath

D

Phloem

Question 199: Palette 199/210

Allen MCQ

In leaves of C₄ plants malic acid synthesis during CO₂ fixation occurs in :-

A

Bundle sheath

B

Guard cells

C

Epidermal cells

D

Mesophyll cells

Question 200: Palette 200/210

Allen MCQ

The C4 plants are photosynthetically more efficient than C₃ plants because :-

A

The $\mathsf { C O } _ { 2 }$ efflux is not prevented.

B

They have more chloroplasts.

C

The CO₂ compensation point is more.

D

$\mathsf { C O } _ { 2 }$ generated during photorespiration is trapped and recycled through PEP carboxylase.

Question 201: Palette 201/210

Allen MCQ

Electrons from excited chlorophyll molecule of photosystem Il are accepted first by :-

A

Quinone

B

Ferredoxin

C

Cytochrome-b

D

Cytochrome-f

Question 202: Palette 202/210

Allen MCQ

Oxygenic photosynthesis occurs in :-

A

Oscillatoria

B

Rhodospirillum

C

Chlorobium

D

Chromatium

Question 203: Palette 203/210

Allen MCQ

Cyclic photophosphorylation results in the formation of :-

A

ATP and NADPH

B

ATP, NADPH and $\mathsf { O } _ { 2 }$

C

ATP

D

NADPH

Question 204: Palette 204/210

Allen MCQ

PGA as the first CO₂ fixation product was discovered in photosynthesis of :-

A

Bryophyte

B

Gymnosperm

C

Angiosperm

D

Alga

Question 205: Palette 205/210

Allen MCQ

C4 plants are more efficient in photosynthesis than ${ \mathsf { C } } _ { 3 }$ plants due to :-

A

Higher leaf area

B

Presence of larger number of chloroplasts in the leaf cells.

C

Presence of thin cuticle.

D

Lower rate of photorespiration.

Question 206: Palette 206/210

Allen MCQ

Read the following four statements, A, B, C and D and select the right option having both correct statements. Statements:
(A) Z scheme of light reaction takes place in present of PSI only.
(B) Only PSI is functional in cyclic photophosphorylation.
(C) Cyclic photophosphorylation results into synthesis of ATP and NADPH(H⁺) .
(D) Stroma lamellae lack PSIl as well as NADP reductase.

A

A and B

B

B and C

C

C and D

D

B and D

Question 207: Palette 207/210

Allen MCQ

Study the pathway given below: - In which of the following options correct words for all the three blanks A, B and C are indicated?

A

Fixation –Transamination– Regeneration

B

Fixation –Decarboxylation– Regeneration

C

Carboxylation–Decarboxylation – Reduction

D

Decarboxylation – Reduction – Regeneration

Question 208: Palette 208/210

Allen MCQ

In Kranz anatomy, the bundle sheath cells have :-

A

thick walls, many intercellular spaces and few chloroplasts.

B

thin walls, many intercellular spaces and no chloroplasts.

C

thick walls, no intercellular spaces and large number of chloroplasts.

D

thin walls, no intercellular spaces and several chloroplasts.

Question 209: Palette 209/210

Allen MCQ

A process that makes important difference between C₃ and C4 plants is :-

A

Photosynthesis

B

Photorespiration

C

Transpiration

D

Glycolysis

Question 210: Palette 210/210

Allen MCQ

The correct sequence of cell organelles during photorespiration is :-

A

Chloroplast-peroxisome-mitochondria

B

Chloroplast-vacuole-peroxisome.

C

Chloroplast-Golgi bodies-mitochondria

D

Chloroplast-Rough endoplasmic reticulum-Dictyosomes.