Which of the following statements best describes the relative concentrations of G3P and RuBP in a chloroplast as a result of a transition from daytime (light)to nighttime (dark)?
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

G3P is a product of the Calvin cycle, which occurs during the light-dependent reactions of photosynthesis. RuBP is a reactant in the Calvin cycle. When the light-dependent reactions stop at night, the Calvin cycle also stops, so the concentration of G3P will increase and the concentration of RuBP will decrease.

Which of the Following Statements Best Describes the Relative Concentrations