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Multiple Choice
What is the primary function of the Calvin cycle in organic chemistry reactions?
A
To oxidize water and release oxygen
B
To generate ATP and NADPH
C
To fix carbon dioxide into organic molecules
D
To break down glucose into pyruvate
Verified step by step guidance
1
Understand the context: The Calvin cycle is a series of biochemical reactions that occur in the stroma of chloroplasts in photosynthetic organisms. It is part of the process of photosynthesis.
Identify the main purpose: The primary function of the Calvin cycle is to fix carbon dioxide from the atmosphere into organic molecules, which are then used to build carbohydrates like glucose.
Clarify the process: The Calvin cycle uses ATP and NADPH, produced in the light-dependent reactions of photosynthesis, to convert carbon dioxide into glyceraldehyde-3-phosphate (G3P), a three-carbon sugar.
Recognize the importance: The fixation of carbon dioxide is crucial for the synthesis of organic compounds, which are essential for the growth and energy needs of the plant.
Differentiate from other processes: Unlike the Calvin cycle, processes like glycolysis break down glucose into pyruvate, and the light-dependent reactions generate ATP and NADPH, but do not fix carbon dioxide.