AP Biologyhardmcq1 pt

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

A.A) To generate ATP from the energy released from glucose.

B.B) To produce NADH from NAD+.

C.D) To reduce the energy content of glucose molecules.

D.C) To pump protons across the mitochondrial membrane.

Explanation

Core Concept

The electron transport chain plays a crucial role in cellular respiration by pumping protons across the mitochondrial membrane, creating a proton gradient that drives the synthesis of ATP through chemiosmosis. This is a key step in the process of oxidative phosphorylation. Options A, B, and D are incorrect because the electron transport chain is not directly responsible for generating ATP, producing NADH, or reducing the energy content of glucose.

Correct Answer

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