Uracil is present in RNA at the place of

Options

A. adenine
B. guanine
C. cytosine
D. thymine

Answer

To answer the question "Uracil is present in RNA at the place of," we need to identify which nitrogen base in DNA is replaced by uracil in RNA.

### Step-by-Step Solution:

1. **Understanding the Structure of RNA and DNA:**
- RNA (Ribonucleic Acid) and DNA (Deoxyribonucleic Acid) are both nucleic acids composed of nucleotides, which include a phosphate group, a sugar, and a nitrogenous base.

2. **Identifying the Nitrogen Bases:**
- DNA contains four nitrogen bases: Adenine (A), Guanine (G), Cytosine (C), and Thymine (T).
- RNA also contains four nitrogen bases: Adenine (A), Guanine (G), Cytosine (C), and Uracil (U).

3. **Recognizing the Key Difference:**
- The key difference between RNA and DNA is that in RNA, the nitrogen base Thymine (T) found in DNA is replaced by Uracil (U).

4. **Conclusion:**
- Therefore, uracil is present in RNA at the place of thymine in DNA.

### Final Answer:
Uracil is present in RNA at the place of thymine.

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