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Multiple Choice
In what way are the light-dependent and light-independent reactions of photosynthesis similar?
A
Both produce glucose as a direct product.
B
Both require direct sunlight to proceed.
C
Both take place in the thylakoid membrane.
D
Both occur within the chloroplast.
Verified step by step guidance
1
Understand the two main stages of photosynthesis: light-dependent reactions and light-independent reactions (Calvin cycle). Light-dependent reactions occur in the thylakoid membrane and require sunlight, while light-independent reactions occur in the stroma and do not require direct sunlight.
Recognize that both stages are part of the overall process of photosynthesis, which occurs within the chloroplast, the organelle responsible for photosynthesis in plant cells.
Clarify that glucose is not directly produced by either stage. Instead, the light-independent reactions use ATP and NADPH (produced in the light-dependent reactions) to synthesize glucose indirectly.
Note that light-dependent reactions require sunlight to generate ATP and NADPH, while light-independent reactions use these molecules to fix carbon dioxide into glucose without requiring sunlight.
Conclude that the similarity between the two reactions is that both occur within the chloroplast, even though they take place in different parts of the organelle (thylakoid membrane for light-dependent reactions and stroma for light-independent reactions).