The incorrect statement is

Options

A. Co-enzymes serve as co-factors in a number of different enzyme catalyzed reactions
B. Prosthetic groups serve as co-factors in a number of different enzyme catalyzed reactions
C. Zinc is a Co-factor for the proteolytic enzyme canboxy peptidase
D. None of these

Answer

To determine the incorrect statement from the provided options regarding enzyme co-factors, let's analyze each statement step by step.

### Step-by-Step Solution:

1. **Understanding Co-factors**: Co-factors are non-protein chemical compounds that are required for the biological activity of some enzymes. They can be metal ions or organic molecules.

2. **Analyzing the Statements**:
- **Statement 1**: "Boric enzyme serves as co-factors in a number of different enzyme-catalyzed reactions."
- **Evaluation**: Boric acid is not typically known as a co-factor in enzyme reactions. This statement seems incorrect.

- **Statement 2**: "Prosthetic group serves as co-factors in a number of different enzyme-catalyzed reactions."
- **Evaluation**: Prosthetic groups are indeed a type of co-factor that are tightly bound to enzymes and assist in their function. This statement is correct.

- **Statement 3**: "Zinc is the co-factor for the proteolytic enzyme carboxypeptidase."
- **Evaluation**: Zinc is indeed a known co-factor for carboxypeptidase, which is a proteolytic enzyme. This statement is correct.

- **Statement 4**: "None of this."
- **Evaluation**: This statement implies that all previous statements are correct, which is not true since Statement 1 is incorrect.

3. **Conclusion**: The incorrect statement is **Statement 1**: "Boric enzyme serves as co-factors in a number of different enzyme-catalyzed reactions."

### Final Answer:
The incorrect statement is: **"Boric enzyme serves as co-factors in a number of different enzyme-catalyzed reactions."**

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