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Multiple Choice
In which part of the chloroplast is glucose formed during photosynthesis?
A
Intermembrane space
B
Outer membrane
C
Stroma
D
Thylakoid membrane
Verified step by step guidance
1
Step 1: Understand the process of photosynthesis. Photosynthesis occurs in two main stages: the light-dependent reactions and the light-independent reactions (Calvin cycle). The light-dependent reactions take place in the thylakoid membrane, while the Calvin cycle occurs in the stroma of the chloroplast.
Step 2: Recall the role of the stroma in the Calvin cycle. The stroma is the fluid-filled space within the chloroplast where enzymes necessary for the Calvin cycle are located. This cycle uses ATP and NADPH produced during the light-dependent reactions to convert carbon dioxide into glucose.
Step 3: Eliminate incorrect options. The intermembrane space and outer membrane are structural components of the chloroplast but do not play a direct role in glucose formation. The thylakoid membrane is involved in the light-dependent reactions, not the Calvin cycle.
Step 4: Focus on the correct location. Glucose is formed during the Calvin cycle, which occurs in the stroma. This is where carbon fixation, reduction, and regeneration of ribulose-1,5-bisphosphate (RuBP) take place.
Step 5: Conclude that the stroma is the correct answer. The stroma provides the environment and necessary enzymes for the Calvin cycle, leading to the formation of glucose during photosynthesis.