MDCAT Biology MCQ #457

Two mobile carriers, Plastoquinone (PQ) and Plastocyanin (PC), facilitate electron flow in plants. What distinguishes the nature of Plastoquinone?

MDCAT Biology MCQ #457

  1. Question 1

    Q1. Two mobile carriers, Plastoquinone (PQ) and Plastocyanin (PC), facilitate electron flow in plants. What distinguishes the nature of Plastoquinone?

    • A) Plastoquinone is a protein located on the stroma side
    • B) Plastoquinone is a mobile, lipid-soluble electron carrier
    • C) Plastocyanin moves electrons from PS II to the Cytochrome complex
    • D) Plastocyanin is the primary electron acceptor of PS II

    Answer: Plastoquinone is a mobile, lipid-soluble electron carrier

    Explanation: Plastoquinone is a lipid-soluble mobile carrier within the membrane, while Plastocyanin is a water-soluble copper protein.