What is the end product of the payoff phase of glycolysis?Group of answer choicesaldolaseglyceraldehyde 3-phosphatepyruvatepyruvate kinase

To determine the end product of the payoff phase of glycolysis, let's first understand the key aspects of this metabolic pathway.

Glycolysis Overview

Glycolysis can be divided into two main phases:

1. Investment Phase: The first half of glycolysis where ATP is consumed to prepare glucose for breakdown.
2. Payoff Phase: The second half where ATP and NADH are produced as glucose is broken down into pyruvate.

Payoff Phase Details

During the payoff phase, glucose is ultimately converted into two molecules of pyruvate through a series of enzymatic reactions. The critical reactions include the conversion of glyceraldehyde 3-phosphate to 1,3-bisphosphoglycerate, and finally, the conversion of phosphoenolpyruvate to pyruvate, yielding ATP and NADH in the process.

Answer Analysis

From the provided options:

• Aldolase: It's an enzyme involved in the split of fructose 1,6-bisphosphate into two three-carbon sugars, but not an end product.
• Glyceraldehyde 3-phosphate (G3P): It is an intermediate in glycolysis but not the end product.
• Pyruvate: This is the final product of glycolysis after the payoff phase.
• Pyruvate kinase: This is an enzyme that catalyzes the conversion of phosphoenolpyruvate to pyruvate but is not the end product.

Final Answer

The end product of the payoff phase of glycolysis is pyruvate.