Which type of bond is present between nitrogenous base and pentose sugar?

Options

A. Phosphodiester bond
B. N-glycosidic linkage
C. Co-ordination linkage
D. Hydrogen bond

Answer

### Step-by-Step Solution:

1. **Understanding the Components**:
- In the context of DNA, we have two main components: nitrogenous bases (like adenine, thymine, guanine, and cytosine) and pentose sugar (deoxyribose in DNA).

2. **Identifying the Bond**:
- The bond that connects the nitrogenous base to the pentose sugar is crucial for the structure of nucleotides, which are the building blocks of DNA.

3. **Types of Bonds in DNA**:
- **N-glycosidic Bond**: This is the specific type of bond that forms between the nitrogenous base and the pentose sugar. It occurs when the nitrogen atom of the base forms a bond with the 1' carbon of the sugar.
- **Phosphodiester Bond**: This bond connects the phosphate group of one nucleotide to the 3' carbon of the sugar of another nucleotide, forming the backbone of the DNA strand.
- **Hydrogen Bonds**: These bonds occur between complementary nitrogenous bases (A-T and G-C) and help stabilize the double helix structure of DNA.

4. **Conclusion**:
- The correct answer to the question about the type of bond present between the nitrogenous base and the pentose sugar is the **N-glycosidic bond**.