Print Cal ulator Periodic Table Print Calculator 3 of 26 incorred E Incorrect Th

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Print Cal ulator Periodic Table Print Calculator 3 of 26 incorred E Incorrect The path of carbon through the glycolytic pathway is shown in the figure at the right. glucose Some of these steps are reversible and catalyzed by the same enzyme acting in either direction, glycolysis or gluconeogenesis. Which reaction steps are irreversible and require a different enzyme in gluconeogenesis than in glycolysis? (Check all that apply) glucose-6-phosp fruclose-6-phosph AT dihydroxyacetoneglycer 8 10 e that many of these stepis are reversible However, beca and should be shown with eqiuirbriunt arrows.e ir, becaiset this question asks about reversible and ineversible renctions, the arroiws are written n orne dioection

Explanation / Answer

Of the ten steps, only three reactions of the glycolysis that are practically irreversible and that can not be employed in the gluconeogenesis. Those are:

Glycolysis:

1. Hexokynase

3. phosphofructokinase

10. pyruvate kinase

Gluconeogenesis

1. glucose-6-phosphatase

3. fructose 1,6 bisphosphatase

10. pyruvate carboxylase and PEP carboxykinase

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