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Below is a multiple choice question. Choose the correct answer (A,B or C) for this question, and then in detail explain why the other answers are incorrect, making reference to the relevant cell processes. Please organize your response for A, B and C separately.
Question: The electron transport chain (ETC) in cellular respiration differs from the ETC in photosynthesis in the following way
A. In respiration the ETC creates a proton gradient with the higher proton concentration on the outer side of the membrane whereas in photosynthesis the ETC creates a proton gradient with the higher proton concentration on the inner side of the membrane.
B. In respiration the ETC creates a proton gradient whereas in photosynthesis the ETC creates a sodium (Na+) gradient.
C. In respiration the ETC gradient is used to power ATP production by oxidative phosphorylation whereas in photosynthesis the ETC gradient is used to power ATP production by substrate level phosphorylation.
Can someone provide a short and brief explanation. It doesnt have to be long. Thanks in advance!
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