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Thylakoid Proton Gradient
Grade Level
AP Biology
APB.189 Thylakoid Proton Gradient
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A student uses mitochondrial terminology and says chloroplast protons accumulate in the intermembrane space. Which correction best fits chloroplast light reactions?
A
In chloroplasts, protons accumulate in the matrix before flowing into the stroma.
B
In chloroplasts, the photosynthetic electron transport chain builds the H+ gradient across the thylakoid membrane, with H+ accumulating in the thylakoid lumen.
C
In chloroplasts, protons accumulate outside the outer membrane before reducing NADP+.
D
In chloroplasts, protons accumulate in the cytosol because ATP synthase faces outward.
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