NAD is

A

Nicotinamide adenosine diphosphate

B

Nicotine adenosine adenosine phosphate

C

Nicotinamide adenine dinucleotide

D

None of the above.

Text Solution

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Question**: The question asks for the full form of NAD. It is essential to recognize that NAD is commonly referred to in biological contexts. 2. **Identifying the Options**: The options provided include: - Nicotinamide - Nicotinamide Adenosine Diphosphate - Nicotinamide Adenine Dinucleotide - None of the above 3. **Defining NAD**: NAD stands for Nicotinamide Adenine Dinucleotide. It is a coenzyme that plays a crucial role in metabolism and is found in all living cells. 4. **Explaining the Structure**: NAD is classified as a nucleotide because it consists of two nucleotides. These nucleotides are joined together by their phosphate groups. - One nucleotide contains an adenine base. - The other nucleotide contains a nicotinamide base. 5. **Conclusion**: Based on the explanation, the correct answer to the question is "Nicotinamide Adenine Dinucleotide." ### Final Answer: NAD is Nicotinamide Adenine Dinucleotide. ---
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