In which of the labeled cells of a C4 leaf are the Calvin cycle reactions performed?

Question

Quizplus · Accepted Answer

The Calvin cycle reactions are performed in the mesophyll cells (C), which are the specialized cells of C4 plants where CO2 is initially fixed into a C4 molecule. The bundle sheath cells (A and B) are where the C4 molecule is transported and decarboxylated, releasing CO2 for the Calvin cycle reactions in the adjacent mesophyll cells (C). The vascular tissue (D) serves to transport water and nutrients throughout the plant, and is not directly involved in photosynthesis.

In Which of the Labeled Cells of a C4 Leaf