Question

cellular respiration
oxygen is an important molecule in which of the following?
citric acid cycle and electron transport chain
electron transport chain only
citric acid cycle only
glycolysis only
glycolysis, citric acid cycle, and electron transport chain

Explanation:

Oxygen is the final electron - acceptor in the electron transport chain of cellular respiration. It is not directly involved in glycolysis (which is anaerobic) or the citric acid cycle (which does not directly use oxygen).

Answer:

Electron transport chain only