Plastoquinone (PQ), an electron carrier of small molecular weight, is found in the electron transport chain associated with photosystem II. If PQ is not directly anchored to other membrane or cytoplasmic structures, it is probably ________.

Question

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PQ is lipid soluble and serves as a shuttle between the electron transport chain and ATP synthase. Its small molecular weight allows it to move freely within the thylakoid membrane.

Plastoquinone (PQ), an Electron Carrier of Small Molecular Weight, Is