The energy source for the synthesis of carbohydrates in the Calvin cycle is A) ATP only. B) photons. C) energized chlorophyll a. D) NADPH + H⁺. E) NADPH and ATP.

Question

Quizplus · Accepted Answer

The synthesis of carbohydrates in the Calvin cycle requires energy input in the form of ATP and reducing power in the form of NADPH. Therefore, option E, "NADPH and ATP," is the correct choice. Options A, B, and C are incorrect because ATP or photons alone cannot provide the necessary reducing power for carbohydrate synthesis. Option D is incorrect because it includes an additional compound, H⁺, that is not involved in the Calvin cycle.

The Energy Source for the Synthesis of Carbohydrates in the Calvin