Beginning with the step catalyzed by rubisco, arrange the steps in the Calvin cycle in the proper sequence in which they occur.
A)carboxylation, reduction, regeneration
B)reduction, regeneration, carboxylation
C)regeneration, carboxylation, reduction
D)carboxylation, regeneration, reduction
E)reduction, carboxylation, regeneration

Question

Quizplus · Accepted Answer

The correct order of the Calvin cycle is carboxylation, reduction, and then regeneration. Rubisco catalyzes the carboxylation of ribulose-1,5-bisphosphate (RuBP) with CO2 to form two molecules of 3-phosphoglycerate (3-PGA). Then, ATP and NADPH reduce the 3-PGA to form glyceraldehyde-3-phosphate (G3P), which is used to regenerate RuBP through a series of reactions. Therefore, the correct sequence is A) carboxylation, reduction, regeneration.

Beginning with the Step Catalyzed by Rubisco, Arrange the Steps