Which of the following is the polymer of a nucleotide?

Options

A. Protein
B. Lipid
C. DNA
D. Carbohydrate

Answer

To solve the question "Which of the following is the polymer of a nucleotide?", we need to understand what a nucleotide is and what polymers are.

### Step-by-Step Solution:

1. **Define a Nucleotide**:
A nucleotide is the basic building block of nucleic acids. It consists of three components:
- A nitrogenous base (which can be a purine or a pyrimidine)
- A phosphate group
- A sugar molecule (either ribose in RNA or deoxyribose in DNA)

2. **Understanding Polymers**:
A polymer is a large molecule made up of repeating subunits, known as monomers. In the context of nucleotides, the polymer would be formed by linking many nucleotides together.

3. **Identify the Polymer of Nucleotides**:
The two main types of nucleic acids are DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). Both of these are polymers made up of nucleotide monomers.
- **DNA** is a polymer of deoxyribonucleotides.
- **RNA** is a polymer of ribonucleotides.

4. **Conclusion**:
Since the question asks for the polymer of a nucleotide, the correct answer is **DNA**, as it is the most commonly referenced polymer in biological contexts.

### Final Answer:
The polymer of a nucleotide is **DNA**.