A researcher blocks the terminal step of the electron transport chain in mitochondria. Which molecule's absence as a final electron acceptor would cause this?
Q1. A researcher blocks the terminal step of the electron transport chain in mitochondria. Which molecule's absence as a final electron acceptor would cause this?
Answer: Oxygen
Explanation: Oxygen is the final electron acceptor in the ETC; without it, the chain halts, and water cannot be formed.