Multiple Choice
In which stage of the Calvin Cycle does the plant cell produce energy-rich molecules for storage?
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9. Photosynthesis
Calvin Cycle
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Where do the light-independent reactions of the Calvin Cycle take place in the plant cell?
A
Stroma of the chloroplast
B
Cytoplasm
C
Thylakoid membrane
D
Nucleus
Verified step by step guidance1
Begin by understanding the structure of the chloroplast, which is the organelle where photosynthesis occurs in plant cells. It consists of several parts: the outer membrane, inner membrane, thylakoids, and stroma.
Recognize that the Calvin Cycle, also known as the light-independent reactions, is part of photosynthesis. Unlike the light-dependent reactions, it does not require light and instead uses ATP and NADPH produced in the light-dependent reactions.
Identify the location within the chloroplast where the Calvin Cycle occurs. The stroma is the fluid-filled space surrounding the thylakoids, and it contains enzymes necessary for the Calvin Cycle.
Understand that the thylakoid membrane is where the light-dependent reactions take place, involving the conversion of light energy into chemical energy (ATP and NADPH). This is distinct from the Calvin Cycle, which occurs in the stroma.
Conclude that the stroma of the chloroplast is the correct location for the light-independent reactions of the Calvin Cycle, as it provides the necessary environment and enzymes for the process.
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