MDCAT Biology MCQ #345

High-energy electrons from NADH enter the mitochondrial electron transport chain. Which protein complex is the first to receive these electrons?

MDCAT Biology MCQ #345

  1. Question 1

    Q1. High-energy electrons from NADH enter the mitochondrial electron transport chain. Which protein complex is the first to receive these electrons?

    • A) Cytochrome c
    • B) Ubiquinone
    • C) NADH dehydrogenase
    • D) Cytochrome oxidase

    Answer: NADH dehydrogenase

    Explanation: Complex I (NADH dehydrogenase) accepts electrons specifically from NADH. Complex II is wrong because it is the entry point for FADH2.