A suspension of algae is incubated in a flask in the presence of both light and CO2.When it is transferred to the dark,the reduction of 3-phosphoglycerate (3PG) to glyceraldehyde 3-phosphate (G3P) is blocked,and the concentration of ribulose 1,5-bisphosphate (RuBP) declines.Why does the RuBP concentration decline?
A) RuBP needs to be regenerated from G3P.
B) The regeneration of RuBP requires ATP.
C) Sugar is no longer generated from G3P.
D) There is a corresponding increase in RuMP.
E) Both a and b
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