RNA possess additional______group at ______position in the sugar than the DNA.
(a) OH, 5
(b) H,2
(c) OH,2
(d) H,5

Options

A. OH, 5
B. H,2
C. OH,2
D. H,5

Answer

To solve the question, we need to understand the structural differences between RNA and DNA, particularly focusing on the sugar component of each molecule.

### Step-by-Step Solution:

1. **Identify the Sugars in RNA and DNA**:
- RNA contains ribose sugar.
- DNA contains deoxyribose sugar.

2. **Examine the Structure of Ribose and Deoxyribose**:
- Ribose has the chemical formula C5H10O5 and includes a hydroxyl (OH) group attached to each carbon except for the carbon that is part of the base attachment.
- Deoxyribose has the chemical formula C5H10O4 and is similar to ribose but lacks one oxygen atom (specifically, it has one less hydroxyl group).

3. **Locate the Additional Hydroxyl Group**:
- In ribose, the additional hydroxyl (OH) group is present at the second carbon (C2) position of the sugar.
- In deoxyribose, this hydroxyl group is absent; instead, there is just a hydrogen (H) atom at the second carbon.

4. **Conclusion**:
- Therefore, RNA possesses an additional OH group at the 2nd position in the sugar compared to DNA.

5. **Select the Correct Option**:
- Based on the analysis, the correct answer is (c) OH, 2.

### Final Answer:
(c) OH, 2

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