What is incorrect for UTR?

Options

A. Present in between the translational unit in mRNA
B. Not recognised by any tRNA
C. Required for efficient translation process
D. Provide stability to mRNA

Answer

To determine what is incorrect about UTR (Untranslated Regions), we will analyze the options provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding UTRs**:
- UTRs are segments of mRNA that are not translated into protein. They are located at both the 5' end (5' UTR) and the 3' end (3' UTR) of the mRNA molecule.

2. **Analyzing the Options**:
- **Option 1**: "Present in between the translational unit in mRNA."
- This statement is incorrect because UTRs are not located between the coding sequences (exons) of the mRNA. Instead, they are found at the ends of the mRNA molecule.

- **Option 2**: "Not recognized by any tRNA."
- This statement is correct. UTRs do not have codons that are recognized by tRNA, as they are not translated into proteins.

- **Option 3**: "Required for the efficient translation process."
- This statement is also correct. UTRs play a crucial role in the initiation and regulation of translation, making them important for efficient protein synthesis.

- **Option 4**: "Provides stability to the mRNA."
- This statement is correct as well. The 3' UTR, in particular, is involved in the stability and lifespan of the mRNA molecule.

3. **Conclusion**:
- The only incorrect statement regarding UTRs is **Option 1**, which claims that UTRs are present in between the translational unit in mRNA.

### Final Answer:
The incorrect statement regarding UTR is: **"Present in between the translational unit in mRNA."**

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