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BIOL_1105_60452_202506 Lesson 09 Homework

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When we exercise for a period of time, our muscles begin to ache. This sensation is a result of the buildup of lactic acid as a result of lactic acid fermentation. Since fermentation is being used to synthesize energy, this means that organic molecules are used as the terminal electron acceptors. This process is important because NAD+ can be regenerated. This molecule can be reduced to NADH in glycolysis, allowing the cell to obtain energy through this process.

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Let’s carefully parse the scenario described and each option in turn. Option 1: organic molecules. The text describes lactic acid fermentation where pyruvate—an organic molecule—acts as the terminal electron acceptor, accepting electrons from NADH and becoming lactate. This makes sense chemically, because fermentation uses organic m......Login to view full explanation

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