High School

An aminoacyl–tRNA synthetase attaches an amino acid to atom ___________ of the tRNA in 6TNA.

A. O3′ of Residue A 76 in Chain A
B. O2’ of Residue A 76 in Chain A
C. OP2 of Residue A 76 in Chain A
D. N6 of Residue A 76 in Chain A

Answer :

Final answer:

An aminoacyl-tRNA synthetase attaches an amino acid to the 3' end of the tRNA molecule. In 6TNA, the amino acid is attached to atom O3' of Residue A 76 in Chain A.

Explanation:

An aminoacyl-tRNA synthetase attaches an amino acid to the 3' end of the tRNA molecule. In the case of 6TNA, the amino acid is attached to atom O3' of Residue A 76 in Chain A.

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During protein synthesis, an aminoacyl-tRNA synthetase attaches an amino acid to the O2' of Residue A 76 in Chain A of the tRNA molecule. This precise attachment is essential for accurate translation of the genetic code and proper protein synthesis.

The correct answer is option B.

An aminoacyl-tRNA synthetase is a crucial enzyme responsible for attaching specific amino acids to their corresponding tRNA molecules during the process of protein synthesis. The correct choice for the atom to which the amino acid is attached on the tRNA in the context of the given options is O2' of Residue A 76 in Chain A.

During aminoacylation, the aminoacyl-tRNA synthetase identifies the appropriate tRNA molecule that corresponds to the specific amino acid it carries. This process involves a high degree of specificity to ensure accurate translation of the genetic code. The amino acid is covalently linked to the tRNA through a high-energy bond, forming an aminoacyl-tRNA complex.

In the provided options:

A. O3' of Residue A 76 in Chain A: This is not the correct option, as aminoacyl-tRNA synthetases typically attach the amino acid to the 3' end of the tRNA molecule.

B. O2' of Residue A 76 in Chain A: This is the correct option. Aminoacyl-tRNA synthetases often catalyze the attachment of the amino acid to the 2' hydroxyl group of the ribose sugar at the 3' end of the tRNA molecule.

C. OP2 of Residue A 76 in Chain A: This is not the correct option for amino acid attachment by aminoacyl-tRNA synthetases.

D. N6 of Residue A 76 in Chain A: This is not the correct position for amino acid attachment; N6 generally refers to a nitrogen atom in the adenine base.

Therefore, from the given options the correct one is B.

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