A vitamin devoid of coenzyme

Options

A. Biotin
B. Riboflavin
C. Tocopherol
D. Folic acid

Answer

To determine which vitamin is devoid of coenzyme activity, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Coenzymes**:
- Coenzymes are organic non-protein molecules that assist enzymes in catalyzing reactions. They are essential for the proper functioning of various enzymes in metabolic processes.

2. **Analyzing Each Option**:
- **Option A: Biotin (Vitamin B7)**:
- Biotin is known for its role in the metabolism of fats and amino acids. It acts as a coenzyme for several carboxylase enzymes. Therefore, biotin does have coenzyme activity.

- **Option B: Riboflavin (Vitamin B2)**:
- Riboflavin is involved in the metabolism of carbohydrates, fats, and proteins. It serves as a precursor for coenzymes such as FAD (flavin adenine dinucleotide). Thus, riboflavin also has coenzyme activity.

- **Option C: Tocopherol (Vitamin E)**:
- Tocopherol is primarily known for its antioxidant properties. It does not function as a coenzyme in metabolic reactions. Therefore, tocopherol is devoid of coenzyme activity.

- **Option D: Folic Acid (Vitamin B9)**:
- Folic acid is crucial for DNA and RNA synthesis and acts as a coenzyme in the form of tetrahydrofolate. Hence, folic acid does have coenzyme activity.

3. **Conclusion**:
- After analyzing all the options, we conclude that the vitamin that is devoid of coenzyme activity is **Tocopherol (Vitamin E)**.

### Final Answer:
The vitamin devoid of coenzyme is **Tocopherol (Vitamin E)**.

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