The enzyme that carries out this reaction shown in the diagram below is ________, and the end product is ________.
A) 3-phosphoglycerate synthetase; added to another carbon dioxide
B) 3-phosphoglycerate synthetase; reduced to glyceraldehyde-3-phosphate
C) nitrogenase; reduced to glyceraldehyde-3-phosphate
D) Rubisco; reduced to glyceraldehyde-3-phosphate
E) Rubisco; added to another carbon dioxide

Question

The enzyme that carries out this reaction shown in the diagram below is ________, and the end product is ________. 
A) 3-phosphoglycerate synthetase; added to another carbon dioxide 
B) 3-phosphoglycerate synthetase; reduced to glyceraldehyde-3-phosphate 
C) nitrogenase; reduced to glyceraldehyde-3-phosphate 
D) Rubisco; reduced to glyceraldehyde-3-phosphate 
E) Rubisco; added to another carbon dioxide

Quizplus · Accepted Answer

The enzyme that carries out this reaction is Rubisco, and the end product is reduced to glyceraldehyde-3-phosphate. This is the first step of the Calvin cycle, in which carbon dioxide is fixed into organic compounds. Rubisco catalyzes the reaction of carbon dioxide with ribulose-1,5-bisphosphate (RuBP) to form two molecules of 3-phosphoglycerate, which is then reduced to glyceraldehyde-3-phosphate.

The Enzyme That Carries Out This Reaction Shown in the Diagram