An acid soluble compound formed by phosphorylation of nucleoside is called

Options

A. (a) nitrogen base
B. (b) adenine
C. (c) sugar phosphate
D. (d) nucleotide

Explanation

To solve the question "An acid soluble compound formed by phosphorylation of nucleoside is called," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Nucleoside**:
- A nucleoside is formed when a nitrogen base is linked to a pentose sugar through an N-glycosidic linkage.
- Example nitrogen bases include adenine, guanine, cytosine, and thymine.

2. **Define Phosphorylation**:
- Phosphorylation is the process of adding a phosphate group to a compound.

3. **Identify the Result of Phosphorylation on Nucleoside**:
- When a phosphate group is added to a nucleoside, it transforms into a nucleotide.

4. **Define Nucleotide**:
- A nucleotide consists of three components: a nitrogen base, a pentose sugar, and a phosphate group.
- Nucleotides are the building blocks of nucleic acids like DNA and RNA.

5. **Conclusion**:
- Therefore, the acid-soluble compound formed by the phosphorylation of a nucleoside is called a nucleotide.

### Final Answer:
The correct answer is **option D: nucleotide**.

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