Multiple Choice
Why is the electron transport chain an important step in aerobic respiration?
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8. Respiration
Electron Transport Chain
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What is the primary role of the electron transport chain in cellular respiration?
A
To transfer electrons and pump protons to create a proton gradient
B
To break down fatty acids into acetyl-CoA
C
To synthesize glucose from pyruvate
D
To generate ATP directly from glucose
Verified step by step guidance1
Understand that cellular respiration is a process that cells use to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products.
Recognize that the electron transport chain (ETC) is the final stage of cellular respiration, occurring in the inner mitochondrial membrane.
Identify the primary role of the ETC: it transfers electrons through a series of protein complexes and other molecules.
As electrons move through the ETC, energy is released and used to pump protons (H+) across the mitochondrial membrane, creating a proton gradient.
This proton gradient is crucial because it drives the synthesis of ATP via ATP synthase, a process known as chemiosmosis.
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