The Question is from neet-botany molecular-basis-of-inheritance introduction, and it was created by the author B VENKAT

Question

All the following properties are true for RNA, except

B VENKAT · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
**Primary Concept**: RNA and DNA structure and properties
**Related Topics**: Nucleic acids, nucleotides, ribose, deoxyribose, chemical reactivity of molecules
**Prerequisites**: Basic knowledge of molecular biology, differences between DNA and RNA.
## SOLUTION PATHWAY
**Given Information**:
    The question asks for the property that is NOT true for RNA.
**Method & Steps**:
1. **Analyze Option A**: Uracil is indeed present in RNA instead of thymine, which is found in DNA. So, this statement is correct for RNA.
    Reasoning: This is a key structural difference between RNA and DNA.
2. **Analyze Option B**: Ribose sugar is present in RNA, while deoxyribose is present in DNA. This is a fundamental difference and is correct for RNA.
    Reasoning: This is another defining structural difference.
3. **Analyze Option C**: The 2' carbon of ribose in RNA has a hydroxyl group (-OH), while the 2' carbon of deoxyribose in DNA has only a hydrogen (-H). The statement says the 2'OH group is absent, which is incorrect for RNA.
    Reasoning: The 2'-OH group makes RNA more reactive than DNA.
4. **Analyze Option D**: RNA is indeed more chemically reactive than DNA due to the presence of the 2'-OH group, which makes the phosphodiester bond more susceptible to hydrolysis. This is correct for RNA.
    Reasoning: The presence of a 2'-OH group in RNA contributes to its reactivity.
5. **Identify Incorrect Statement**: Based on the analysis, Option C is the only one that does not accurately describe RNA.
**Final step**:
    Result: Option C is the property that is NOT true for RNA.
    Verification: The other options are well known characteristics of RNA.
## OPTION ANALYSIS
[A] :x:  Uracil *is* present in RNA.
[B] :x: Ribose sugar *is* present in RNA.
[C] ✓: The 2'OH group *is present* in RNA, making this statement false.
[D] :x: RNA *is* more reactive than DNA.
## LEARNING AIDS
**Common Mistakes**:
1. Confusing the sugar types: Forgetting that RNA has ribose and DNA has deoxyribose.
   How to avoid: Remember the 'R' in RNA for 'Ribose' and 'D' in DNA for 'Deoxyribose'.
2. Misunderstanding the role of 2'OH: Not realizing the 2'-OH group in RNA is responsible for its increased reactivity.
    How to avoid: Focus on the chemical structure of ribose and deoxyribose.
**Quick Tips**:
1. Focus on key differences: Remember the key differences in sugar and bases between RNA and DNA.
2. Draw diagrams: Drawing the structures of ribose and deoxyribose can help visualize the difference.

B VENKAT · Answer

Uracil is present instead of thymine

B VENKAT · Answer

Ribose sugar is present

B VENKAT · Answer

The correct Option is "$2'OH$ group is absent"

B VENKAT · Answer

RNA chemically more reactive as compared to DNA

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