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The overall goal of glycolysis, krebs cycle and the electron transport system is the formation of

1. ATP in one large oxidation reaction
2. sugars
3. nucleic acids
4. ATP in small stepwise units

Correct answer: ATP in small stepwise units

Solution

These pathways break down fuel molecules gradually, releasing energy in manageable amounts. That energy is captured efficiently as ATP instead of being lost as heat in one big reaction.

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