In glycolysis reaction, some conversions are reversible and some are irreversible. The reversible conversion is catalyzed by the enzyme

Options

A. Hexokinase
B. Phosphoglycerate kinase
C. Pyruvate kinase
D. Phosphofructokinase-I

Answer

**Step-by-Step Solution:**

1. **Understanding Glycolysis:** Glycolysis is a metabolic pathway that converts glucose into pyruvate, producing ATP and NADH in the process. It consists of a series of reactions, some of which are reversible and some irreversible.

2. **Identifying Reversible and Irreversible Reactions:** In glycolysis, there are specific enzymes that catalyze reversible reactions, while others catalyze irreversible reactions. The question asks specifically about the reversible conversions.

3. **Analyzing the Enzymes:**
- **Hexokinase:** This enzyme catalyzes the conversion of glucose to glucose-6-phosphate. This reaction is irreversible.
- **Phosphoglycerate Kinase:** This enzyme catalyzes the conversion of 1,3-bisphosphoglycerate to 3-phosphoglycerate. This reaction is reversible.
- **Pyruvate Kinase:** This enzyme catalyzes the conversion of phosphoenolpyruvate to pyruvate. This is an irreversible reaction.
- **Phosphofructokinase-1:** This enzyme catalyzes the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate. This is also an irreversible reaction.

4. **Conclusion:** Among the enzymes listed, the one that catalyzes a reversible reaction is **Phosphoglycerate Kinase**.

5. **Final Answer:** The enzyme that catalyzes the reversible conversion in glycolysis is **Phosphoglycerate Kinase**.

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