Uracil is associated with which sugar?

Options

A. Generally Deoxyribose
B. Sometimes Ribose
C. Only ribose
D. Hexose

Answer

To answer the question "Uracil is associated with which sugar?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify Uracil**:
- Uracil is a nitrogenous base that is one of the components of nucleotides. It is specifically found in RNA (ribonucleic acid).

2. **Compare with Thymine**:
- In DNA (deoxyribonucleic acid), thymine is the nitrogenous base that pairs with adenine, whereas uracil replaces thymine in RNA.

3. **Understand the Sugars**:
- The sugar in RNA is ribose, while the sugar in DNA is deoxyribose. The key difference between ribose and deoxyribose is that ribose has a hydroxyl group (-OH) attached to the second carbon atom, while deoxyribose has only a hydrogen atom at that position.

4. **Association of Uracil with Sugar**:
- Since uracil is found only in RNA, it is associated with ribose sugar.

5. **Conclusion**:
- Therefore, the correct answer to the question is that uracil is associated with ribose sugar.

### Final Answer:
Uracil is associated with ribose sugar.

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