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21 October, 19:20

This stage of cellular respiration ends with two ATP molecules and two NADH molecules. A. Krebs cycle B. Electron transport chain C. Calvin cycle D. Glycolysis

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  1. 21 October, 21:47
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    glycolysis
  2. 21 October, 22:03
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    D. Glycolysis

    Explanation:

    In glycolysis, energy is required to break a molecule of glucose into two pyruvate molecules. These two pyruvate molecules are used during pyruvate oxidation; which is stage II of cellular respiration.

    During glycolysis, two molecules of ATP are used and four molecules of ATP are produced. So there is a net gain of two ATP molecules. Hydrolysis of a glucose molecule produces high energy electrons which are used to reduce two NAD + molecules to NADH.

    These two molecules are used in the citric acid cycle to produce more ATP molecules.
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