Question

how many atp & nadph2 is required to fix 1 molicile of co2. in calvin cycle

Answer 1

These reactions require three ATP molecules. RuBP is thus regenerated to begin the cycle again. G3P produced by the Calvin cycle is the raw material used to synthesize glucose and other carbohydrates. The Calvin cycle uses 18 ATP and 12 NADPH molecules to produce one glucose molecule.

Answer 2

3 ATP and 2 NADPH

Explanation:

• The dark reaction or the Calvin cycle takes place in the stroma of the cell where the intermediates of light reaction proceed the reaction in the forward direction.
• The process of Calvin cycle proceeds in three steps: The carbon fixation, the reduction and the regeneration.
• To produce a glucose molecule, the  3 carbon of the 3 Carbon dioxide molecule binds to the 3 RUBP molecules and form 6 molecules of 3 Phosphoglycerate.
• The conversion of 3 phosphoglycerates to 1, 3 bisphosphoglycerates during reduction utilize the electrons of the 9 ATP and 6 NADPH.
• Since 3 molecules require 9 ATP and 6 NADPH, therefore, the fixation of only 1 carbon dioxide requires 3 ATP and 2 NADPH.

Thus, 3 ATP and 2 NADPH is correct.

To learn more:

1. Dark reaction:  https://brainly.in/question/2043804

2. Steps of Calvin cycle: https://brainly.in/question/8220337