Electron Transport Chain and Its Purpose

Medium Biochemistry Bioenergetics

In cellular respiration, ATP production is a crucial process that occurs via several biochemical pathways, primarily oxidative phosphorylation and substrate-level phosphorylation. Understanding the roles of various electron carriers and molecules is essential for grasping how energy is extracted from nutrients. Which of the following statements best describes the primary purpose of the electron transport chain in eukaryotic cells?

To produce ATP directly from glucose during glycolysis.

To transfer electrons derived from NADH and FADH<sub>2</sub> to molecular oxygen.

To catalyze the conversion of pyruvate to acetyl-CoA.

To synthesize citrate from acetyl-CoA and oxaloacetate in the citric acid cycle.

Hint

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