The ATP generated from cellular respiration is not sufficient to drive the Calvin cycle in plants,even if appropriate levels of NADPH and CO2 are present.Why not?
A)Plants do not undergo cellular respiration
B)Breaking down sugar to provide the energy needed to synthesize sugar would be a futile cycle
C)The Calvin cycle requires more ATP than can possibly be made from cellular respiration
D)Cellular respiration and photosynthesis do not happen in the same cells in plants

Question

Quizplus · Accepted Answer

The ATP generated from cellular respiration is used primarily for cellular functions such as muscle contraction, active transport, and metabolic processes. Using ATP produced from cellular respiration to drive the Calvin cycle, which synthesizes glucose, would be a waste of energy and resources, as the glucose would then be broken down again through cellular respiration to provide ATP. It is much more efficient for plants to use ATP produced from light-dependent reactions in photosynthesis to drive the Calvin cycle.

The ATP Generated from Cellular Respiration Is Not Sufficient to Drive