Question

The electron transport chain uses the high-energy electrons from the Krebs cycle to

a) Produce ATP
b) Convert carbon dioxide to oxygen
c) Synthesize glucose
d) Break down lipids

Answer 1

The electron transport chain uses the high-energy electrons from the Krebs cycle to produce ATP.

Step-by-step explanation:

The electron transport chain is a part of aerobic respiration that uses free oxygen as the final electron acceptor. It is composed of four large protein complexes embedded in the inner mitochondrial membrane. The high-energy electrons from the Krebs cycle, carried by NADH and FADH2, are passed through the electron transport chain and gradually lose energy. This energy is used to pump hydrogen ions across the membrane and create an electrochemical gradient, which is then used by ATP synthase to produce ATP through oxidative phosphorylation. Therefore, the answer to the question is a) Produce ATP.