MDCAT Biology MCQ #555

The electron transport chains of mitochondria and chloroplasts are similar. What is the distinguishing factor regarding the end of the chain?

MDCAT Biology MCQ #555

  1. Question 1

    Q1. The electron transport chains of mitochondria and chloroplasts are similar. What is the distinguishing factor regarding the end of the chain?

    • A) The identity of the final electron acceptor
    • B) The use of cytochromes as electron carriers
    • C) The generation of a proton motive force
    • D) The synthesis of ATP via an enzyme complex

    Answer: The identity of the final electron acceptor

    Explanation: In the ETC, oxygen is the final electron acceptor, whereas in the light reactions, NADP+ is the final electron acceptor.