Question 6 • 41111de1 ECAD Fall 2026 - Q2 - NM-Biology - S1
During photosynthesis, hydrogen ions build up inside the thylakoid, creating a higher concentration there than in the stroma. They flow down this concentration gradient through ATP synthase into the stroma, and that movement provides energy to convert ADP into ATP. Choice A describes both the direction of ion flow and the direct result.
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