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Multiple Choice
Which step of aerobic cellular respiration is responsible for producing the most ATP molecules?
A
Fermentation
B
Citric Acid Cycle (Krebs Cycle)
C
Glycolysis
D
Electron Transport Chain
Verified step by step guidance
1
Understand that aerobic cellular respiration consists of several stages: Glycolysis, Citric Acid Cycle (Krebs Cycle), and the Electron Transport Chain.
Recognize that Glycolysis occurs in the cytoplasm and breaks down glucose into pyruvate, producing a small amount of ATP.
Identify that the Citric Acid Cycle takes place in the mitochondria and processes acetyl-CoA, generating some ATP and electron carriers like NADH and FADH2.
Learn that the Electron Transport Chain is located in the inner mitochondrial membrane and uses electrons from NADH and FADH2 to create a proton gradient.
Realize that the Electron Transport Chain is responsible for the majority of ATP production in aerobic respiration through oxidative phosphorylation, as protons flow back into the mitochondrial matrix via ATP synthase.