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Which carbon atom of deoxyribose sugar i...

Which carbon atom of deoxyribose sugar in DNA does not contain `-underset(|)overset(|)(C)-` OH bond ?

A

`C_(5)`

B

`C_(3)`

C

`C_(2)`

D

`C_(1)`

Text Solution

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The correct Answer is:
To determine which carbon atom of deoxyribose sugar in DNA does not contain a hydroxyl (-OH) bond, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Structure of Deoxyribose**: Deoxyribose is a five-carbon sugar that is part of the DNA structure. It is similar to ribose but lacks one oxygen atom. 2. **Draw the Structure**: The structure of deoxyribose can be represented as follows: - It has a five-membered ring with the following carbon atoms: - Carbon 1 (C1) is attached to a nitrogenous base. - Carbon 2 (C2) has a hydrogen atom instead of a hydroxyl group. - Carbon 3 (C3) has a hydroxyl group (-OH). - Carbon 4 (C4) has a -CH2 group. - Carbon 5 (C5) is connected to the rest of the DNA backbone. 3. **Identify the Hydroxyl Groups**: - C1: Attached to a base (not relevant for -OH). - C2: Contains only a hydrogen atom (no -OH). - C3: Contains a hydroxyl group (-OH). - C4: Does not have a -OH group. - C5: Does not have a -OH group. 4. **Conclusion**: The carbon atom in deoxyribose that does not contain a hydroxyl (-OH) bond is Carbon 2 (C2). ### Final Answer: The carbon atom of deoxyribose sugar in DNA that does not contain a hydroxyl (-OH) bond is **Carbon 2 (C2)**.
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