For the synthesis of one glucose molecule, the Calvin cycle operates for:

1. 2 times 2. 4 times
3. 6 times 4. 8 times
Subtopic:  Dark Reaction : Calvin Cycle |
 94%
Level 1: 80%+
AIPMT - 2000
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For the assimilation of one CO2 molecule in C3 plants, the energy required in the form of ATP and NADPH2 is:
1. 2 ATP & 2 NADPH2
2. 5 ATP & 3 NADPH2
3. 3 ATP & 2 NADPH2
4. 18 ATP & 12 NADPH2
Subtopic:  Dark Reaction : Calvin Cycle |
 79%
Level 2: 60%+
AIPMT - 2000
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In C3 plants, the first stable product of photosynthesis during the dark reaction is:

1. Oxaloacetic acid

2. 3-phosphoglyceric acid

3. Phosphoglyceraldehyde

4. Malic acid 

Subtopic:  Dark Reaction : Calvin Cycle |
 82%
Level 1: 80%+
AIPMT - 2004
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As compared to a C3-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C4-plants:

1. Zero 2. Six
3. Two 4. Twelve 
Subtopic:  Dark Reaction : Calvin Cycle | C4 Cycle (Hatch & Slack Pathway) |
Level 3: 35%-60%
AIPMT - 2005
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