Consider the following statements:
A. All enzymes require an additional chemical component called cofactor or coenzyme for their catalytic function.
B. The cofactor for pyruvate kinase is `K^(+)`
Which of the statements given above is/are correct?

Options

A. A only
B. B only
C. Both A and B
D. Neither A nor B

Answer

To solve the question regarding the correctness of the statements about enzymes and their cofactors, we will analyze each statement step by step.

### Step-by-Step Solution:

1. **Analyze Statement A**:
- The statement claims that "All enzymes require an additional chemical component called cofactor or coenzyme for their catalytic function."
- **Evaluation**: This statement is incorrect. While many enzymes do require cofactors or coenzymes to function, there are also simple enzymes that are made purely of protein and can function independently without any additional components. For example, enzymes like pepsin and trypsin are purely protein-based and do not require cofactors.

2. **Analyze Statement B**:
- The statement claims that "The cofactor for pyruvate kinase is K⁺."
- **Evaluation**: This statement is correct. Pyruvate kinase is an enzyme that catalyzes the conversion of phosphoenolpyruvate to pyruvate, and it requires potassium ions (K⁺) as a cofactor for its activity.

3. **Conclusion**:
- Since Statement A is incorrect and Statement B is correct, the answer to the question is that only Statement B is correct.

### Final Answer:
- The correct statement is: **Only Statement B is correct.**