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Q. No.
Which of the following are required for the dark reaction of photosynthesis?
A: Light
B: Chlorophyll
C: CO2
D: ATP
E: NADPH

Choose the correct answer from the options given below:
1. B, C and D only
2. C, D and E only
3. D and E only
4. A, B and C only
Subtopic:  Dark Reaction: Biosynthetic Phase | Dark Reaction : Calvin Cycle |
 65%
Level 2: 60%+
NEET - 2024
Hints
How many molecules of ATP and NADPH are required for every molecule of \(\text{CO}_2\) fixed in the Calvin cycle?
1. 2 molecules of ATP and 2 molecules of NADPH
2. 3 molecules of ATP and 3 molecules of NADPH
3. 3 molecules of ATP and 2 molecules of NADPH
4. 2 molecules of ATP and 3 molecules of NADPH
Subtopic:  Dark Reaction : Calvin Cycle |
 79%
Level 2: 60%+
NEET - 2024
Hints
Given below are two statements:
Statement I: In \(\text{C}_3\) plants, some \( \text{O}_2\) binds to \(\text{RuBisCO},\) hence \(\text{CO}_2\) fixation is decreased.
Statement II: In \( \text{C}_4\) 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 option given below:
1. Both Statement I and Statement II are False
2. Statement I is True but Statement II is False
3. Statement I is False but Statement II is True
4. Both Statement I and Statement II are True
Subtopic:  Photorespiration |
 60%
Level 2: 60%+
NEET - 2024
Hints
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The photochemical phase of photosynthesis include:
A. Oxygen release B. Formation of NADPH
C. Use of ATP D. Water splitting
E. Carboxylation
Choose the correct answer from the options given below:
1. C and E only 2. A, B and D only
3. B, C and E only 4. A, B, C and D only
Subtopic:  Light Reaction: Electron Transport |
 64%
Level 2: 60%+
NEET - 2024
Hints
Match List-I with List-II
List-I List-II
A C4 Pathway I. \(2\text{H}_2\text{O}\rightarrow4\text{H}^++\text{O}_2=4\text{e}^-\)
B. Light reaction II. Ribulose 1,5-bisphosphate
C. Photorespiration III. 3-carbon molecule, phosphoenol pyruvate
D.  Calvin cycle   IV.  Phosphoglycolate
Choose the correct answer from the options given below:
1. A-II, B-I, C-IV, D-III
2. A-IV, B-II, C-I, D-III
3. A-III, B-I, C-IV, D-II
4. A-III, B-IV, C-II, D-I
Subtopic:  Photosystems | Dark Reaction : Calvin Cycle | C4 Cycle (Hatch & Slack Pathway) | Photorespiration |
 80%
Level 1: 80%+
NEET - 2024
Hints
How many molecules of ATP and NADPH are required, respectively, for fixation of every CO2 molecule entering the Calvin cycle?
1. 2 and 4
2. 4 and 2
3. 3 and 2
4. 2 and 3
Subtopic:  Dark Reaction : Calvin Cycle |
 91%
Level 1: 80%+
NEET - 2024
Hints
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Synthesis of ATP linked to development of a proton gradient across a membrane is:
1. Mass flow hypothesis 2. Wobble hypothesis
3. Chemiosmotic hypothesis 4. Rivet Popper hypothesis
Subtopic:  Chemiosmotic hypothesis |
 96%
Level 1: 80%+
NEET - 2024
Hints
The reaction centre in PS II has an absorption maxima at:
1. 780 nm 2. 680 nm
3. 700 nm  4. 660 nm
Subtopic:  Light Reactions |
 90%
Level 1: 80%+
NEET - 2023
Hints
How many ATP and NADPH2  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 |
 90%
Level 1: 80%+
NEET - 2023
Hints
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Which of the following combinations is required for chemiosmosis? 
1. Proton pump, electron gradient, NADP synthase. 
2. Membrane, proton pump, proton gradient, ATP synthase. 
3. Membrane, proton pump, proton gradient, NADP synthase 
4. Proton pump, electron gradient, ATP synthase 
Subtopic:  Chemiosmotic hypothesis |
 80%
Level 1: 80%+
NEET - 2023
Hints
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