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?
1. 1 ATP + 1 NADPH
2. 1 ATP + 2 NADPH
3. 2 ATP + 1 NADPH
4. 2 ATP + 2 NADPH

Subtopic:  Dark Reaction : Calvin Cycle |
From NCERT
NEET - 2022
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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). The primary acceptor of electrons 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.

Choose the correct answer from the options given below:
1. (a), (b) and (e) 2. (a), (b) and (d)
3. (b), (c) and (d) 4. (b), (c) and (e)
Subtopic:  Chemiosmotic hypothesis |
 75%
From NCERT
NEET - 2022
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The ratio of carbon dioxide fixation between C4 plants and C3 plants is : 

1.2:1 2.2: 3 
3.1:1 4.1:2 
Subtopic:  Dark Reaction : Calvin Cycle |
 58%
NEET - 2022
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The products of light reaction in photosynthesis are: 
1. ATP, NADPH and \(\text{O}_2\)
2. ATP, NADPH, \(\text{O}_2\) and \(\text{H}_2 \text{O}\)
3. ATP, NADPH and \(\text{H}_2 \text{O}\)
4. ATP, NADPH and \(\text{CO}_2\)

Subtopic:  Light Reaction: Electron Transport | Light Reactions |
 77%
From NCERT
NEET - 2022
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What is the role of large bundle sheath cells found around the vascular bundles in C4 plants?

1. To protect the vascular tissue from high light intensity.
2. To provide the site for photorespiratory pathway.
3. To increase the number of chloroplast for the operation of Calvin cycle.
4. To enable the plant to tolerate high temperature.
Subtopic:  Question on C4 Pathway |
NEET - 2022
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"Girdling Experiment" was performed by Plant Physiologists to identify the plant tissue through which:
1. osmosis is observed
2. water is transported
3. food is transported
4. for both water and food transportation
Subtopic:  Historical View: Experiments |
 62%
NEET - 2022
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Given below are two statements: 
Statement I: The primary \(CO_2\) acceptor in \(C_4\) plants is phosphoenolpyruvate and is found in the mesophyll cells. 
Statement II: Mesophyll cells in \(C_4\) plants lack RuBisCO enzyme.
In the light of the above statements, choose the correct answer from the options given below : 
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II  are incorrect.
4. Statement I is correct but Statement II is incorrect.
Subtopic:  C4 Cycle (Hatch & Slack Pathway) |
 81%
From NCERT
NEET - 2022
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Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis?
It involves: 
1. Reduction of NADP to NADPH2 on the stroma side of the membrane 
2. Breakdown of proton gradient 
3. Breakdown of electron gradient 
4. Movement of protons across the membrane to the stroma 
Subtopic:  Chemiosmotic hypothesis |
 73%
From NCERT
NEET - 2022
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The reaction centre in PS II has an absorption maxima at:
1.780 nm2.680 nm
3.700 nm 4.660 nm
Subtopic:  Light Reactions |
 88%
From NCERT
NEET - 2023
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How many ATP and NADPH are required for the synthesis of one molecule of glucose during Calvin cycle?
1. 18 ATP and 16 NADPH2 2. 12 ATP and 12 NADPH2
3. 18 ATP and 12 NADPH2 4. 12 ATP and 16 NADPH2
Subtopic:  Dark Reaction : Calvin Cycle |
 86%
From NCERT
NEET - 2023
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