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Multiple Choice
What is the primary function of the enzyme RuBisCO in organic chemistry?
A
Converts pyruvate into acetyl-CoA in the citric acid cycle
B
Facilitates the breakdown of glucose during glycolysis
C
Synthesizes ATP from ADP and inorganic phosphate
D
Catalyzes the carboxylation of ribulose-1,5-bisphosphate in the Calvin cycle
Verified step by step guidance
1
Understand that RuBisCO stands for Ribulose-1,5-bisphosphate carboxylase/oxygenase, which is an enzyme involved in the Calvin cycle of photosynthesis.
Recognize that the Calvin cycle is a series of biochemical reactions that take place in the chloroplasts of photosynthetic organisms, primarily responsible for carbon fixation.
Identify the role of RuBisCO in the Calvin cycle: it catalyzes the reaction between carbon dioxide (CO₂) and ribulose-1,5-bisphosphate (RuBP), a 5-carbon sugar, to form two molecules of 3-phosphoglycerate (3-PGA).
Note that this reaction is a carboxylation process, where CO₂ is added to RuBP, making RuBisCO crucial for the conversion of inorganic carbon into organic compounds.
Understand that the primary function of RuBisCO is not related to glycolysis, the citric acid cycle, or ATP synthesis, but specifically to the carboxylation of RuBP in the Calvin cycle.