The component present in both nucleotides and nucleosides is

Options

A. sugar
B. phosphate
C. nitrogenous base
D. both (a) and (b)

Explanation

To solve the question regarding the component present in both nucleotides and nucleosides, we can break it down step by step:

### Step-by-Step Solution:

1. **Understanding Nucleosides and Nucleotides**:
- A **nucleoside** is made up of a nitrogenous base and a pentose sugar (ribose or deoxyribose).
- A **nucleotide** is composed of three components: a nitrogenous base, a pentose sugar, and a phosphate group.

2. **Identifying Common Components**:
- Since nucleosides consist of a nitrogenous base and a sugar, we need to find out what components are shared with nucleotides.
- Nucleotides contain a nitrogenous base, a sugar, and a phosphate group.

3. **Comparing Components**:
- Both nucleosides and nucleotides contain **sugar** (the pentose sugar).
- Nucleotides also contain a **phosphate group**, which is not present in nucleosides.

4. **Analyzing the Options**:
- Option A: Sugar - This is present in both nucleotides and nucleosides.
- Option B: Phosphate - This is only present in nucleotides, not in nucleosides.
- Option C: Nitrogenous base - This is present in both, but we are looking for components common to both.
- Option D: Both A and B - Since sugar is present in both and phosphate is not in nucleosides, this option is not correct.

5. **Conclusion**:
- The correct answer is that the component present in both nucleotides and nucleosides is **sugar**.

### Final Answer:
The component present in both nucleotides and nucleosides is **sugar**.

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