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14 August, 05:35

The Pay-Off phase. Which two reactions pay-off ATP? a. Enolase and triose phosphate isomerase glyceraldehyde b. 3-phosphate dehydrogenase and phosphoglycerate c. kinase pyruvate kinase and phosphoglycerate d. kinase phosphoglycerate mutase and pyruvate kinase

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  1. 14 August, 05:55
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    Answer: Option C) pyruvate kinase and phosphoglycerate kinase

    Explanation:

    The last five reactions of the glycolysis refers to the Pay-Off phase. Here, energy is liberated in the form of ATP as:

    - phosphoglycerate kinase catalyzes the conversion of 1,3-Diphosphoglycerate to 3-Phosphoglycerate

    - Pyruvate kinase catalyzes the conversion of Phosphoenolpyruvate to pyruvate

    Thus, pyruvate kinase and phosphoglycerate kinase catalyzes ATP-yeilding reactions of the Pay-Off phase
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