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Multiple Choice
In the context of organic chemistry, what is the primary product of the Calvin cycle?
A
Lactic acid
B
Glucose
C
Pyruvate
D
Acetyl-CoA
Verified step by step guidance
1
Understand the Calvin cycle: The Calvin cycle is a series of biochemical reactions that occur in the stroma of chloroplasts in photosynthetic organisms. It is part of the light-independent reactions of photosynthesis.
Identify the main purpose of the Calvin cycle: The primary function of the Calvin cycle is to convert carbon dioxide and water into organic compounds, primarily glucose, using the energy derived from ATP and NADPH produced in the light-dependent reactions.
Recognize the key steps of the Calvin cycle: The cycle involves three main stages: carbon fixation, reduction phase, and regeneration of ribulose bisphosphate (RuBP). During these stages, carbon dioxide is fixed into a stable intermediate, reduced to form glyceraldehyde-3-phosphate (G3P), and RuBP is regenerated.
Determine the primary product: The Calvin cycle ultimately produces glyceraldehyde-3-phosphate (G3P), which can be used to form glucose and other carbohydrates. Glucose is the primary product synthesized from G3P.
Clarify the options: Lactic acid, pyruvate, and acetyl-CoA are not products of the Calvin cycle. These compounds are involved in other metabolic pathways such as glycolysis and the citric acid cycle.