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 _____.
A)mobile in the thylakoid membrane
B)lipid soluble
C)a molecule that serves as a shuttle between the electron transport chain and ATP synthase
D)Both A and B are correct.

Question

Quizplus · Accepted Answer

PQ is a small molecular weight electron carrier that is lipid-soluble and can move freely within the thylakoid membrane. It shuttles electrons between photosystem II and the cytochrome b6f complex in the electron transport chain. Therefore, both options A and B are correct.

Plastoquinone (PQ),an Electron Carrier of Small Molecular Weight,is Found in the Electron