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Photosynthesis In Higher Plants

497 Questions MCQ (Single Correct) Start Allen Test
All Exams Allen Errorless
NEET 2024 Q1 Errorless Critical Thinking MCQ
How many molecules of ATP and NADPH are required for every molecule of $C O _ { 2 }$ 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
NEET 2024 Q2 Errorless Critical Thinking MCQ
Which of the following are required for the dark reaction of photosynthesis
(A) Light
(B) Chlorophyll
(C) $C O _ { 2 }$
(D) ATP
(E) NADPH
A.
A, B and C only
B.
B, C and D only
C.
C, D and E only
D.
D and E only
NEET 2024 Q3 Errorless Critical Thinking MCQ
Given below are two statements Statement I : In $C _ { 3 }$ plants, some $O _ { 2 }$ binds to RuBisCO, hence $C O _ { 2 }$ fixation is decreased Statement II : In $C _ { 4 }$ 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.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
NEET 2023 Q4 Errorless Critical Thinking MCQ
The reaction centre in PS II has an absorption maxima at
A.
700 nm
B.
660 nm
C.
780 nm
D.
680 nm
NEET 2023 Q5 Errorless Critical Thinking 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
NEET 2022 Q6 Errorless Critical Thinking MCQ
Given below are two statemets Statement I : The primary $C O _ { 2 }$ acceptor in $C _ { 4 }$ plants is phosphoenolpyruvate and is found in the mesophyll cells Statement II : Mesophyll cells of $C _ { 4 }$ plants lack RuBisCo enzyme. In the light of the above statements, choose the correct answer from the options given below
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
NEET 2022 Q7 Errorless Critical Thinking MCQ
Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis ? It involves
A.
Movement of protons across the membrane to the stroma
B.
Reduction of $N A D P$ to $N A D P H _ { 2 }$ on the stoma side of the membrane
C.
Breakdown of proton gradient
D.
Breakdown of electron gradient
NEET 2022 Q8 Errorless Critical Thinking MCQ
What is the role of large bundle sheath cells found around the vascular bundles in $C _ { 4 }$ plants
A.
To enable the plant to tolerate high temperature
B.
To protect the vascular tissue from high light intensity
C.
To provide the site for photorespiratory pathway
D.
To increase the number of chloroplast for the operation of Calvin cycle
NEET 2021 Q9 Errorless Critical Thinking MCQ
The first stable product of $C O _ { 2 }$ fixation in sorghum is Or Which of the following is a 4-carbon compound [NCERT Pg. No. 145] [Kerala PMT 2010]
A.
Oxaloacetic acid
B.
Succinic acid
C.
Phosphoglyceric acid
D.
Pyruvic acid
NEET 2021 Q10 Errorless Critical Thinking MCQ
Which of the following statements is incorrect
A.
Stroma lamellae have PS I only and lack NADP reductase
B.
Grana lamellae have both PS I and PS II
C.
Cyclic photophosphorylation involves both PS I and PS II
D.
Both ATP and $NADPH + H^+$ are synthesized during non-cyclic photophosphorylation
NEET 2020 Q11 Errorless Critical Thinking MCQ
In light reaction, plastoquinone facilitates the transfer of electrons from
A.
PS-I to ATP synthase
B.
PS-II to ${ \mathsf { C y t b } } _ { 6 } \mathrm { f }$ complex
C.
Cytbf complex to PS-I
D.
PS-I to $\mathrm { N A D P ^ { + } }$
NEET 2018 Q12 Errorless Light reaction/Pigments MCQ
Which of the following is not a product of light reaction of photosynthesis
A.
ATP
B.
NADH
C.
NADPH
D.
Oxygen
NEET 2017 Q13 Errorless C₄/CAM/Photorespiration MCQ
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct
A.
Light saturation for $C O _ { 2 }$ fixation occurs at 10% of full sunlight
B.
Increasing atmospheric $C O _ { 2 }$ concentration up to 0.05% can enhance $C O _ { 2 }$ fixation rate
C.
$C _ { 3 }$ plants respond to higher temperatures with enhanced photosynthesis while $C _ { 4 }$ plants have much lower temperature optimum
D.
Tomato is a greenhouse crop which can be grown in $C O _ { 2 }$ enriched atmosphere for higher yield
NEET (Phase-I) 2016 Q14 Errorless History of photosynthesis 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
WB JEE 2016 Q15 Errorless C₄/CAM/Photorespiration MCQ
The entire reactions of $C _ { 4 }$ pathway takes place in
A.
Mesophyll and bundle sheath
B.
Vascular bundle and palisade tissue
C.
Mitochondria and peroxisome
D.
Bundle sheath and endoplasmic reticulum
WB JEE 2016 Q16 Errorless Critical Thinking MCQ
Photosynthesis cannot be operated in
A.
Red light
B.
Yellow light
C.
Green light
D.
Blue light
NEET (Phase-I) 2016 Q17 Errorless Critical Thinking MCQ
In a chloroplast the highest number of protons are found in [NCERT $\mathbf { p _ { \mathbb { { g } } } } .$ No. 141]
A.
Stroma
B.
Lumen of thylakoids
C.
Inter membrane space
D.
Antennae complex
MHCET 2015 Q18 Errorless Light reaction/Pigments MCQ
The visible portion of light spectrum useful in photosynthesis is referred to as
A.
RFLP
B.
PAR
C.
VAM
D.
VNTR
GUJCET 2015 Q19 Errorless C₄/CAM/Photorespiration MCQ
During photorespiration which compounds are formed having 2C and 3C respectively in Peroxisome
A.
Glycolate, Glycine
B.
Glycine, Glycerate
C.
Serine, Glycine
D.
Phosphoglycerate, Glycolate
MHCET 2015 Q20 Errorless C₄/CAM/Photorespiration MCQ
Which one of the following is a CAM plant
A.
Maize
B.
Kalanchoe
C.
Sugarcane
D.
Jowar
GUJCET 2015; MHCET 2015 Q21 Errorless Critical Thinking MCQ
In this process which of the following play important role
A.
Chlorophyll
B.
Light energy
C.
$C a ^ { + + } , M n ^ { + + } , C l ^ { - }$
D.
All of the above
AIPMT 2015 Q22 Errorless Critical Thinking MCQ
Chromatophores take part in
A.
Growth
B.
Movement
C.
Respiration
D.
Photosynthesis
GUJCET 2014 Q23 Errorless Dark reaction MCQ
If bundlesheath cells of the $C _ { 4 }$ plants are infected by an organism, which utilize $C O _ { 2 }$ efficiently then which process will be affected very first
A.
PGAL → RUBP
B.
PGAL + PGA → Glucose
C.
PGA → PGAL
D.
RUBP → PGA
MP PMT 2013 Q24 Errorless Dark reaction MCQ
Ribulose diphosphate carboxylase enzyme catalyses the carboxylation reaction between
A.
Oxaloacetic acid and acetyl CoA
B.
$C O _ { 2 }$ and ribulose 1, 5 diphosphate
C.
Ribulose diphosphate and phosphoglyceraldehyde
D.
PGA and dihydroxy acetone phosphate
Kerala PMT 2012 Q25 Errorless Experiments MCQ
Which of the following with respect to early experiments of photosynthesis is wrongly matched
A.
Joseph Priestley- Showed that plants release $O _ { 2 }$
B.
Jan Ingenhousz- Showed that sunlight is essential for photosynthesis
C.
Julius von Sachs - Proved that plants produce glucose when they grow
D.
T.W. Engelmann - Showed that the green substance is located within special bodies in plant
E.
Cornelius van Net – Showed that hydrogen reduces $C O _ { 2 }$ to carbohydrates