Compare the proton gradient in chloroplasts or mitochondria with the calcium (Ca

Question

Compare the proton gradient in chloroplasts or mitochondria with the calcium (Ca2+) gradient across the membrane of the sarcoplasmic reticulum (SR) of a muscle cell: When considering to which form of energy the gradient is converted, calcium flowing along its concentration gradient during muscle contraction is most like protons flowing through the:

photosynthetic electron transport chain.

mitochondrial ATP synthase.

chloroplast ATP synthase.

mitochondrial electron transport chain.

uncoupling protein.

photosynthetic electron transport chain.

mitochondrial ATP synthase.

chloroplast ATP synthase.

mitochondrial electron transport chain.

uncoupling protein.

Explanation / Answer

Answer Mitochnondrial electron transport chain. - In SR the calcium gradient is formed and in Mitochondrial electron transport chain proton gradient is formed.

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