Which site of an enzyme is called allosteric site ?

Explanation

### Step-by-Step Solution:

1. **Understanding Enzyme Structure**:
Enzymes are biological catalysts that speed up chemical reactions in the body. They have specific regions where substrates bind to facilitate these reactions.

2. **Identifying the Active Site**:
The active site of an enzyme is the specific region where the substrate binds. This site is crucial for the enzyme's catalytic activity.

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