MHT CET 202624 AprilEvening Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 24 April
- Shift
- Evening Shift
- Subject
- Biology
- Chapter
- Molecular Basis of Inheritance
MHT CET 2026 · 24 April · Evening Shift · Biology · Molecular Basis of Inheritance
What is the role of the DHU arm of a tRNA molecule?
What is the role of the DHU arm of a tRNA molecule?
Options
- AAmino acid recognition site.
- BAmino acid binding site.
- CCodon recognition site.
- DRibosome recognition site.
Correct answer
A. Amino acid recognition site.
Step-by-step solution
The tRNA molecule has several specific regions with distinct functions:
The DHU loop (dihydrouridine loop) acts as the recognition site for the specific aminoacyl-tRNA synthetase enzyme, which is responsible for adding the correct amino acid. Hence, it is known as the amino acid recognition site.
The 3' end (CCA sequence) is the amino acid binding site where the amino acid physically attaches.
The anticodon loop is the codon recognition site that pairs with the mRNA codon.
The T C loop is the ribosome recognition site.
Answer: Amino acid recognition site.
The DHU loop (dihydrouridine loop) acts as the recognition site for the specific aminoacyl-tRNA synthetase enzyme, which is responsible for adding the correct amino acid. Hence, it is known as the amino acid recognition site.
The 3' end (CCA sequence) is the amino acid binding site where the amino acid physically attaches.
The anticodon loop is the codon recognition site that pairs with the mRNA codon.
The T C loop is the ribosome recognition site.
Answer: Amino acid recognition site.