MDCAT Biology MCQ #220

In the respiratory electron transport chain, electrons are passed through a series of carriers. Which carrier finally transfers electrons to oxygen?

MDCAT Biology MCQ #220

  1. Question 1

    Q1. In the respiratory electron transport chain, electrons are passed through a series of carriers. Which carrier finally transfers electrons to oxygen?

    • A) Cytochrome b
    • B) Cytochrome c
    • C) Cytochrome a3
    • D) Coenzyme Q

    Answer: Cytochrome a3

    Explanation: Cytochrome a3 is the final component of the mitochondrial ETC that transfers electrons to oxygen, the terminal acceptor.