Purines of RNA are

Options

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

Answer

### Step-by-Step Solution:

1. **Understanding Purines and Pyrimidines**:
- In nucleic acids, there are two types of nitrogenous bases: purines and pyrimidines.
- Purines are larger, double-ring structures, while pyrimidines are smaller, single-ring structures.

2. **Identifying Purines in RNA**:
- The two purines found in both DNA and RNA are adenine (A) and guanine (G).
- In RNA, adenine pairs with uracil (U) instead of thymine (T), which is found in DNA.

3. **Listing the Purines**:
- Therefore, the purines present in RNA are:
- **Adenine (A)**
- **Guanine (G)**

4. **Conclusion**:
- The answer to the question "Purines of RNA are?" is adenine and guanine.