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Photosynthesis In Higher Plants

210 Questions Start Allen Test
All Exams Allen Errorless
Q76 Allen 4. PHOTORESPIRATION & FACTOR AFFECTING PHOTOSYNTHESIS MCQ
Photorespiration is favoured by :-
A.
Low light intensity
B.
Low Oā‚‚ & high COā‚‚
C.
Low temperature
D.
High $\mathsf { O } _ { 2 }$ & Low $\mathsf { C O } _ { 2 }$
Q77 Allen 4. PHOTORESPIRATION & FACTOR AFFECTING PHOTOSYNTHESIS MCQ
What is Cā‚‚ - Cycle ?
A.
Glycolate cycle
B.
Calvin cycle
C.
Kreb's cycle
D.
TCA - cycle
Q78 Allen 4. PHOTORESPIRATION & FACTOR AFFECTING PHOTOSYNTHESIS 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.
Q79 Allen 4. PHOTORESPIRATION & FACTOR AFFECTING PHOTOSYNTHESIS 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
Q80 Allen 4. PHOTORESPIRATION & FACTOR AFFECTING PHOTOSYNTHESIS MCQ
DCMU is an inhibitor of :-
A.
PS-I
B.
PS-II
C.
Calvin cycle
D.
Kreb's cycle
Q81 Allen 4. PHOTORESPIRATION & FACTOR AFFECTING PHOTOSYNTHESIS 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
Q82 Allen 4. PHOTORESPIRATION & FACTOR AFFECTING PHOTOSYNTHESIS 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
Q83 Allen 4. PHOTORESPIRATION & FACTOR AFFECTING PHOTOSYNTHESIS MCQ
The law of limiting factor for photosynthesis was given by :-
A.
R. Hill
B.
Krebs
C.
Calvin
D.
Blackman
Q84 Allen 5. PYQ MCQ
Anoxygenic photosynthesis is characteristic of-
A.
Rhodospirillum
B.
Spirogyra
C.
Chlamydomonas
D.
Ulva
Q85 Allen 5. PYQ MCQ
Chromatophores take part in: -
A.
Respiration
B.
Photosynthesis
C.
Growth
D.
Movement
Q86 Allen 5. PYQ MCQ
In photosynthesis, the light-independent reactions take place at :-
A.
Stromal matrix
B.
Thylakoid lumen
C.
Photosystem-I
D.
Photosystem-II
Q87 Allen 5. PYQ 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
Q88 Allen 5. PYQ 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
Q89 Allen 5. PYQ 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
Q90 Allen 5. PYQ 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
Q91 Allen 5. PYQ 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
Q92 Allen 5. PYQ MCQ
Phosphonyl pyruvate (PEP) is the primary $\mathsf { C O } _ { 2 }$ acceptor in :
A.
C4 plants
B.
$\mathsf { C } _ { 2 }$ plants
C.
Cā‚ƒ and $\mathsf { C } _ { 4 }$ plants
D.
${ \mathsf { C } } _ { 3 }$ plants
Q93 Allen 5. PYQ MCQ
Oxygen is not produced during photosynthesis by: -
A.
Green Sulphur bacteria
B.
Nostoc
C.
Cycas
D.
Chara
Q94 Allen 5. PYQ MCQ
Which of the following is not a product of light reaction of photosynthesis?
A.
ATP
B.
NADH
C.
NADPH
D.
Oxygen
Q95 Allen 5. PYQ MCQ
In Hatch and Slack pathway, the primary COā‚‚ acceptor is: -
A.
Oxaloacetic acid
B.
Phosphoglyceric acid
C.
Phosphoenol pyruvate
D.
RuBisCO
Q96 Allen 5. PYQ 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
Q97 Allen 5. PYQ MCQ
In light reaction, plastoquinone facilitates the transfer of electrons from :
A.
PS-I to ATP synthase
B.
PS-II to Cytbā‚†f complex
C.
Cytbā‚†f complex to PS-I
D.
PS-I to NADPāŗ
Q98 Allen 5. PYQ 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
Q99 Allen 5. PYQ 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
Q100 Allen 5. PYQ 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