Amino acid is carried by tRNA at its

Options

A. 5' end where OH is present
B. 3' end here OH is present
C. recognition site
D. loop I

Answer

To answer the question "Amino acid is carried by tRNA at its:", we will break down the structure of tRNA and identify where the amino acid is attached.

### Step-by-Step Solution:

1. **Understanding tRNA Structure**:
- tRNA (transfer RNA) is a molecule that plays a crucial role in protein synthesis by bringing amino acids to the ribosome.
- It has a specific three-dimensional structure that includes several key components: the acceptor stem, the anticodon loop, and various arms (T arm, D arm).

2. **Identifying the Key Sites**:
- **Acceptor Stem**: This is the region at the 3' end of the tRNA where the amino acid attaches.
- **Anticodon Loop**: This part contains the anticodon, which is complementary to the mRNA codon. It does not carry the amino acid.
- **3' End**: The 3' end of the tRNA is where the amino acid is covalently bonded.

3. **Amino Acid Attachment**:
- The amino acid is specifically attached to the 3' end of the tRNA molecule. This is where the hydroxyl group (-OH) is present, allowing for the formation of an ester bond between the amino acid and the tRNA.

4. **Conclusion**:
- Therefore, the correct answer to the question is that the amino acid is carried by tRNA at its **3' end**.

### Final Answer:
Amino acid is carried by tRNA at its **3' end**.

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