Coenzymes NAD and NADP contain the vitamin

Options

A. Niacin
B. Biotin
C. Thiamine
D. Vitamin `B_(12)`

Answer

**Step-by-Step Solution:**

1. **Identify the Coenzymes**: The question asks about the coenzymes NAD and NADP. These are important molecules in cellular metabolism.

2. **Understand the Composition**: NAD stands for nicotinamide adenine dinucleotide, while NADP stands for nicotinamide adenine dinucleotide phosphate. Both coenzymes are derived from the same vitamin.

3. **Determine the Vitamin**: The key to answering the question is to identify which vitamin is associated with the formation of NAD and NADP.

4. **Recall the Vitamins**: The options provided are niacin, biotin, thymine, and vitamin B12.

5. **Connect the Vitamin to Coenzymes**: Niacin is also known as vitamin B3. It is essential for the synthesis of NAD and NADP.

6. **Conclusion**: Since niacin (vitamin B3) is the vitamin that forms NAD and NADP, the correct answer is option 1: niacin.

**Final Answer**: The coenzymes NAD and NADP contain the vitamin niacin (vitamin B3).

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