ATP affects the movement of malate from mesophyll cells to bundle sheath cells in which manner?
A) ATP drives the carboxylation of PEP.
B) ATP drives the regeneration of PEP.
C) ATP drives the transport of malate.
D) ATP activates rubisco.
E) ATP drives starch synthesis.

Question

Quizplus · Accepted Answer

ATP is crucial for the regeneration of phosphoenolpyruvate (PEP) in the C4 photosynthetic pathway, which indirectly affects the movement of malate from mesophyll cells to bundle sheath cells. This regeneration step is essential for the continuous fixation of CO2 into malate in mesophyll cells, which is then transported to bundle sheath cells for the Calvin cycle.

ATP Affects the Movement of Malate from Mesophyll Cells to Bundle