MDCAT Biology MCQ #146

As electrons pass through the respiratory chain in the mitochondria, they eventually combine with protons and a terminal molecule. Identify this terminal electron acceptor.

MDCAT Biology MCQ #146

  1. Question 1

    Q1. As electrons pass through the respiratory chain in the mitochondria, they eventually combine with protons and a terminal molecule. Identify this terminal electron acceptor.

    • A) NAD+
    • B) Molecular Oxygen
    • C) Carbon dioxide
    • D) Cytochrome c

    Answer: Molecular Oxygen

    Explanation: Oxygen is the terminal electron acceptor in the ETC, forming water; NAD+ is an electron carrier, not the final acceptor in aerobic respiration.