In C4 plants,which of the following events of photosyntesis takes place first?
A) carbon from carbon dioxide is fixed by an enzyme that does not use oxygen
B) carbon from carbon dioxide is fixed by rubisco
C) glucose is produced
D) glucose is converted into sucrose
E) RuBP splits into two PGA molecules

Question

Quizplus · Accepted Answer

In C4 plants, the first step in photosynthesis is the fixation of carbon from carbon dioxide by an enzyme called PEP carboxylase, which does not use oxygen. This occurs in specialized cells called mesophyll cells, which are distinct from the cells where the Calvin cycle occurs. The fixed carbon is then transferred to bundle sheath cells, where the traditional Calvin cycle takes place.

In C4 Plants,which of the Following Events of Photosyntesis Takes