Ribose sugar occurs in

Options

A. RNA and ATP
B. RNA polymerase and ATP
C. RNA only
D. RNA polymerase, RNA and ATP.

Answer

### Step-by-Step Solution:

1. **Understanding Ribose Sugar**: Ribose sugar is a five-carbon sugar (pentose) that is a crucial component of nucleotides, which are the building blocks of nucleic acids like RNA and ATP.

2. **Identifying the Options**: The question provides several options:
- RNA and ATP
- RNA polymerase and ATP
- RNA only
- RNA polymerase
- RNA and ATP (repeated)

3. **Analyzing RNA**:
- RNA (Ribonucleic Acid) is a type of nucleic acid that contains ribose sugar as its sugar component.
- It consists of ribose sugar, nitrogenous bases (adenine, guanine, cytosine, and uracil), and a phosphate group.

4. **Analyzing ATP**:
- ATP (Adenosine Triphosphate) is the energy currency of the cell.
- It is composed of adenine (a nitrogenous base), ribose sugar, and three phosphate groups.
- Thus, ATP also contains ribose sugar.

5. **Analyzing RNA Polymerase**:
- RNA polymerase is an enzyme responsible for synthesizing RNA from a DNA template.
- It does not contain ribose sugar as part of its structure; it is a protein enzyme.

6. **Conclusion**:
- The only options that contain ribose sugar are RNA and ATP.
- Therefore, the correct answer is **RNA and ATP**.

### Final Answer:
The correct answer is **RNA and ATP**.

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