Question

multiple choice question compared to the c₃ pathway, the c₄ pathway has an additional cost to a plant, because _______. o atp is required to decarboxylate malate o atp is required to transport acids to and from the mesophyll cells o atp is required to convert pyruvate to pep o atp is required by pep carboxylase

Explanation:

In the C₄ pathway, to regenerate PEP (phosphoenolpyruvate) from pyruvate, ATP is used. This step is an additional energy - consuming process compared to the C₃ pathway. Decarboxylation of malate in C₄ plants does not require ATP. Transport of acids to and from mesophyll cells is not the main additional ATP - consuming step. PEP carboxylase does not directly require ATP for its function.

Answer:

ATP is required to convert pyruvate to PEP