The inhibitor which does not resemble the substrate in structure and binds to the enzyme at site other than the active site is called

Options

A. competitive inhibitor
B. non-competitive inhibitor
C. activator
D. substrate analogue.

Explanation

To solve the question, we need to identify the type of inhibitor described. The question states that the inhibitor does not resemble the substrate in structure and binds to the enzyme at a site other than the active site. Let's break down the options and analyze them step by step.

### Step-by-Step Solution:

1. **Understand the Types of Inhibitors**:
- **Competitive Inhibitor**: This type of inhibitor resembles the substrate and competes with it for binding at the active site of the enzyme.
- **Non-Competitive Inhibitor**: This type of inhibitor does not compete with the substrate for the active site. Instead, it binds to a different site on the enzyme, which can change the enzyme's shape and function.
- **Activator**: This is not an inhibitor; rather, it enhances the activity of the enzyme.
- **Substrate Analog**: This term typically refers to a molecule that mimics the substrate but may not bind at the active site.

2. **Analyze the Question**:
- The question specifies that the inhibitor does not resemble the substrate in structure. This rules out competitive inhibitors.
- It also states that the inhibitor binds to a site other than the active site, which aligns with the behavior of non-competitive inhibitors.

3. **Identify the Correct Answer**:
- Since the question describes an inhibitor that binds to a site other than the active site and does not resemble the substrate, the correct answer is **non-competitive inhibitor**.

### Final Answer:
The inhibitor which does not resemble the substrate in structure and binds to the enzyme at a site other than the active site is called a **non-competitive inhibitor**.

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