Which of the following options represents correct set of steps for an enzyme catalysed reaction

Options

A. `E + S rarr ES rarr E + P`
B. `E rarr ES rarrEP`
C. `SrarrP`
D. 1 or 3

Answer

To solve the question regarding the correct set of steps for an enzyme-catalyzed reaction, we can break down the process into clear steps:

### Step-by-Step Solution:

1. **Substrate and Enzyme Interaction**:
- The reaction begins with the enzyme (E) and the substrate (S) coming together to form an enzyme-substrate complex (ES).
- This step is crucial as it represents the initial interaction where the substrate binds to the active site of the enzyme.

2. **Formation of the Enzyme-Product Complex**:
- After the formation of the ES complex, the enzyme catalyzes the conversion of the substrate into products (P).
- This step involves the breaking and forming of chemical bonds, leading to the transformation of the substrate into the product.

3. **Release of the Product**:
- Once the reaction is complete, the product (P) is released from the enzyme, resulting in the formation of the enzyme-product complex (EP).
- The enzyme is now free to catalyze another reaction cycle.

4. **Regeneration of the Enzyme**:
- Finally, the enzyme (E) is regenerated and remains unchanged after the reaction, allowing it to participate in subsequent reactions with new substrate molecules.

### Summary of Steps:
- **Step 1**: Formation of enzyme-substrate complex (ES).
- **Step 2**: Conversion of substrate to product (P).
- **Step 3**: Release of product (P) from the enzyme.
- **Step 4**: Regeneration of the enzyme (E).

Based on these steps, the correct option that represents this sequence is option B.