Question

What is the role of the electron transport chain in cellular respiration?

A. It converts pyruvic acid into glucose.
B. It breaks down glucose into carbon dioxide.
C. It uses high-energy electrons from the Krebs cycle to convert ADP into ATP.
D. It produces ethyl alcohol and carbon dioxide in the absence of oxygen.

Answer 1

The electron transport chain uses high-energy electrons from the Krebs cycle to convert ADP into ATP in cellular respiration.

Step-by-step explanation:

The electron transport chain plays a crucial role in cellular respiration by using high-energy electrons from the Krebs cycle to convert ADP into ATP. It is a series of chemical reactions that occur in the inner membrane of the mitochondria. As the electrons pass through the electron transport chain, they lose energy, which is used to pump hydrogen ions across the membrane. This creates a gradient that powers the synthesis of ATP by ATP synthase.