Cellular respiration harvests the most chemical energy from which of the following?

• A. Fermentation
• B. Electron Transport Chain
• C. Citric Acid Cycle
• D. Glycolysis

Answer: (B)

Verified step by step guidance

1. Begin by understanding the process of cellular respiration, which is the method cells use to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products.
2. Identify the main stages of cellular respiration: Glycolysis, Citric Acid Cycle (also known as Krebs Cycle), and Electron Transport Chain (ETC).
3. Recognize that Glycolysis occurs in the cytoplasm and breaks down glucose into pyruvate, producing a small amount of ATP and NADH.
4. Understand that the Citric Acid Cycle takes place in the mitochondria, where acetyl-CoA is oxidized, producing NADH, FADH2, and a small amount of ATP.
5. Learn that the Electron Transport Chain is located in the inner mitochondrial membrane, where NADH and FADH2 are used to create a proton gradient that drives the synthesis of a large amount of ATP through oxidative phosphorylation.