Question

What is the main function of t-RNA?

(a) Proof reading

(b) Inhibits protein synthesis

(c) Identifies amino acids and transport them to ribosomes

(d) None of the mentioned

The question was asked at a job interview.

The doubt is from RNA Processing in section DNA, RNA and Protein Metabolism of Biochemistry

Answer 1

The correct answer is:

(c) Identifies amino acids and transports them to ribosomes

Explanation: The main function of transfer RNA (tRNA) is to carry specific amino acids to the ribosomes during protein synthesis. Each tRNA molecule has an anticodon that pairs with the corresponding codon on the messenger RNA (mRNA) sequence. This ensures the correct amino acid is added to the growing polypeptide chain according to the mRNA code.

• Proofreading (a) is primarily performed by other components, such as ribosomal RNA (rRNA) and certain enzymes, during translation.
• Inhibition of protein synthesis (b) is not the role of tRNA; instead, it helps facilitate protein synthesis.
• None of the mentioned (d) is incorrect because option (c) describes the function of tRNA correctly.