1. 18 ATP and 16 NADPH ₂ 2. 12 ATP and 12 NADPH ₂ 3. 18 ATP and 12 NADPH ₂ 4. 12 ATP and 16 NADPH ₂

How many ATP and NADPH_2 are required for the synthesis of one molecule of Glucose during Calvin cycle?

1. 18 ATP and 16 NADPH\(_2\)

2. 12 ATP and 12 NADPH\(_2\)

3. 18 ATP and 12 NADPH\(_2\)

4. 12 ATP and 16 NADPH\(_2\)

Doubtly Asked 30 Oct 2026 NEET UG 2023 Practice test neet Save WhatsApp Report

Best answer

Answer: 3. 18 ATP and 12 NADPH\(_2\)

Key idea: One \(\mathrm{CO_2}\) fixed in the Calvin cycle needs 3 ATP and 2 NADPH.

Glucose has 6 carbons, so 6 turns are needed: ATP \(=6\times3=18\), NADPH \(=6\times2=12\). Option 3.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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