In the Cori cycle, when glucose is degraded by glycolysis to lactate in muscle, the lactate...

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In the Cori cycle, when glucose is degraded by gly

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Answer 1

Answer #1

1. The correct answer is both.

Explanation: In the glycolysis, Fructose-1,6-bisphosphate is cleaved to produce Glyceraldehyde-3-phosphate. This reaction is catalyzed by aldolase.

Aldolase is also used in the gluconeogenesis pathway where it is used to convert Glyceraldehyde-3-phosphate to Fructose-1,6-bisphosphate.

2. The correct answer is gluconeogenesis.

Explanation: In the gluconeogenesis pathway, pyruvate is converted to oxaloacetate by the enzyme pyruvate carboxylase and this oxaloacetate is converted to phosphoenolpyruvate by the enzyme phosphoenolpyruvate carboxykinase.

3. The correct answer is neither.

Explanation: Transketolase is an enzyme involved in the pentose phosphate pathway and it is also involved in the Calvin cycle of photosynthesis.

4. The correct answer is gluconeogenesis.

Explanation: In the gluconeogenesis pathway, pyruvate is converted into oxaloacetate by the enzyme pyruvate carboxylase.

5. The correct answer is glycolysis.

Explanation: In the glycolysis pathway, phosphoenolpyruvate is converted into pyruvate by the enzyme pyruvate kinase. It is an irreversible process. So, pyruvate cannot be converted into phosphoenolpyruvate by this enzyme.

6. The correct answer is both.

Explanation: Phosphoglycerate kinase converts 1,3-bisphosphoglycerate into 3-phosphoglycerate during glycolysis. It is a reversible process.

In the gluconeogenesis pathway, this enzyme is used to convert 3-phosphoglycerate into 1,3-bisphosphoglycerate.

7. The correct answer is glycolysis.

Explanation: Phosphofructokinase-1 is used to convert fructose-6-phosphate into fructose-1,6-bisphosphate during glycolysis. It is an irreversible process. So, this enzyme cannot convert fructose-1,6-bisphosphate into fructose-6-phosphate.

8. The correct answer is neither.

Explanation: Pyruvate decarboxylase is used to catalyze the decarboxylation of pyruvate to acetaldehyde. It is used in alcoholic fermentation, that occurs in yeast and several bacterial species.

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