Question

To form one molecule of glyceraldehyde phosphate in Calvin cycle

• A. 9 ATP and 36 NADPH are required
• B. 6 ATP and 6 NADPH are required
• C. E ATP and 3 NADPH are required
• D. 9 ATP and 6 NADPH are required

Answer 1

The correct option is D 9 ATP and 6 NADPH are required

Glyceraldehyde 3-phosphate is a three carbon molecule.
For a three carbon molecule to be synthesised, three turns of the calvin cycle are required, with the entry of a molecule of carbon dioxide at each turn.
Each turn of the calvin cycle consumes three ATP and two NADPH molecules.
Therefore 9 ATP and 6 NADPH molecules are required for three turns of calvin cycle that will result in the formation of glyceraldehyde 3-phosphate.