R.N.A. contains which of the following base, in place of Thymine of D.N.A. :-

Options

A. Thymine
B. Uracil
C. Adenine
D. None of these

Answer

To answer the question "R.N.A. contains which of the following base, in place of Thymine of D.N.A.?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Components of DNA and RNA**:
- DNA (Deoxyribonucleic Acid) contains four nitrogenous bases: Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).
- RNA (Ribonucleic Acid) also contains four nitrogenous bases, but instead of Thymine, it contains a different base.

2. **Identify the Base that Replaces Thymine in RNA**:
- In RNA, Thymine (T) is replaced by Uracil (U). Therefore, the base pairing in RNA involves Adenine (A) pairing with Uracil (U) instead of Thymine.

3. **Review the Options Provided**:
- The options given are:
1. Thymine
2. Uracil
3. Adenine
4. Nano-p
- From our understanding, we can eliminate Thymine, Adenine, and Nano-p as they do not replace Thymine in RNA.

4. **Conclude the Correct Answer**:
- The correct answer is Uracil, which is the base that RNA contains in place of Thymine found in DNA.

### Final Answer:
The base that RNA contains in place of Thymine of DNA is **Uracil**.

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