In EMP pathway, glucose is phosphory lated to form glucose -6- phosphate with the help of which enzyme?

Options

A. Invertase
B. Ligase
C. Catalase
D. Hexokinase

Answer

**Step-by-Step Solution:**

1. **Understanding the EMP Pathway**: The EMP pathway, also known as glycolysis, is a series of biochemical reactions that convert glucose into pyruvate, producing energy in the form of ATP.

2. **Identifying the Reaction**: The first step in the glycolytic pathway involves the phosphorylation of glucose to form glucose-6-phosphate. This is a crucial step as it helps in trapping glucose within the cell and prepares it for further breakdown.

3. **Enzyme Involvement**: To identify the enzyme responsible for this phosphorylation, we need to look at the options provided.

4. **Evaluating Options**:
- **Invertase**: This enzyme catalyzes the hydrolysis of sucrose into glucose and fructose, not involved in the phosphorylation of glucose.
- **Dehydroxyacetone phosphate (DAP)**: This is an intermediate in glycolysis, not an enzyme.
- **Ligase**: This enzyme is involved in joining two molecules together, not in phosphorylation.
- **Catalase**: This enzyme breaks down hydrogen peroxide, not involved in glycolysis.
- **Hexokinase**: This enzyme catalyzes the phosphorylation of glucose to form glucose-6-phosphate.

5. **Conclusion**: The enzyme that phosphorylates glucose to form glucose-6-phosphate in the EMP pathway is **Hexokinase**.

**Final Answer**: Hexokinase

---