Distinguish between apoenzyme and coenzyme.

Explanation

To distinguish between apoenzyme and coenzyme, we can break down the differences into several key aspects:

### Step-by-Step Solution:

1. **Definition**:
- **Apoenzyme**: This is the protein part of an enzyme that requires a cofactor (like a coenzyme) to be active. It is the inactive form of the enzyme.
- **Coenzyme**: This is a non-protein organic molecule that binds to the apoenzyme and is necessary for the enzyme's activity. It acts as a helper or cofactor.

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