Multiple Choice
How many turns of the Calvin cycle are required to produce one molecule of glyceraldehyde-3-phosphate (G3P)?
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9. Photosynthesis
Calvin Cycle
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Which statement about the Calvin cycle is true?
A
The Calvin cycle uses ATP and NADPH to convert CO$_2$ into glucose.
B
The Calvin cycle requires light to proceed.
C
The Calvin cycle occurs in the mitochondrial matrix.
D
O$_2$ is produced as a direct product of the Calvin cycle.
Verified step by step guidance1
Understand the Calvin cycle: The Calvin cycle is a series of biochemical reactions that occur in the stroma of chloroplasts during photosynthesis. It is also known as the light-independent reactions because it does not directly require light to proceed.
Identify the inputs of the Calvin cycle: The cycle uses ATP and NADPH, which are produced during the light-dependent reactions of photosynthesis, as energy sources to drive the conversion of CO$_2$ into organic molecules.
Clarify the outputs of the Calvin cycle: The Calvin cycle does not produce O$_2$ as a direct product. Instead, it produces glyceraldehyde-3-phosphate (G3P), which can be used to form glucose and other carbohydrates.
Determine the location of the Calvin cycle: The Calvin cycle occurs in the stroma of chloroplasts, not in the mitochondrial matrix. The mitochondrial matrix is involved in cellular respiration, not photosynthesis.
Evaluate the requirement for light: While the Calvin cycle itself does not require light, it depends on the ATP and NADPH generated during the light-dependent reactions, which do require light.
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