As a result of the transition from daytime to nighttime,how will the relative concentrations of glyceraldehyde 3-phosphate (G3P)and ribulose 1,5-bisphosphate (RuBP)change in C3 plants?
A)The concentrations of G3P and RuBP would remain the same.
B)The concentrations of G3P and RuBP would both decrease.
C)G3P would increase and RuBP would decrease.
D)G3P would decrease and RuBP would increase.

Question

Quizplus · Accepted Answer

During the daytime, RuBP serves as the substrate for carbon fixation in C3 plants, while G3P is the product of the Calvin cycle. As a result of photosynthesis, G3P accumulates during the day. However, at night, the Calvin cycle is no longer active, and the concentrations of G3P decrease, while RuBP is recycled for use in subsequent cycles. Therefore, the concentration of G3P would decrease and RuBP would increase during the transition from daytime to nighttime in C3 plants, making choice C the correct answer.

As a Result of the Transition from Daytime to Nighttime,how