Bond between phosphate and sugar in a nucleotide is :-

Options

A. H-bond
B. Covelent bond
C. Phosphodiester bond
D. Sulphide bond

Answer

To determine the bond between phosphate and sugar in a nucleotide, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Nucleotides**:
- A nucleotide consists of three main components: a phosphate group, a sugar molecule (which can be ribose in RNA or deoxyribose in DNA), and a nitrogenous base.

2. **Identify the Components**:
- The sugar in nucleotides can either be ribose (in RNA) or deoxyribose (in DNA).
- The phosphate group is attached to the sugar molecule at the 5' carbon atom.

3. **Determine the Type of Bond**:
- The bond that connects the phosphate group to the sugar molecule is crucial for the formation of the nucleotide structure.
- This bond is formed when the phosphate group reacts with the hydroxyl group (-OH) on the sugar.

4. **Recognize the Nature of the Bond**:
- The bond formed between the phosphate group and the sugar is a type of covalent bond. Covalent bonds involve the sharing of electrons between atoms, which provides stability to the nucleotide structure.

5. **Conclusion**:
- Therefore, the bond between the phosphate and sugar in a nucleotide is a **covalent bond**.

### Final Answer:
The bond between phosphate and sugar in a nucleotide is a **covalent bond**.