Question

Different tRNA species that bind to alternate codons for the same amino acid residue; can be one tRNA that recognizes the various codons that signify those for the particular amino acid residue.

A. Ambiguous tRNAs
B. Wobble tRNAs
C. Universal tRNAs
D. Non-specific tRNAs

Answer 1

Wobble tRNAs can recognize and bind to multiple codons for the same amino acid due to the flexibility in base pairing at the third codon position, which allows translation of different codons specifying the same amino acid.

Step-by-step explanation:

The correct answer to the question presented by the student is B. Wobble tRNAs. These tRNAs are capable of recognizing multiple codons for the same amino acid due to the wobble base pairing at the third position of the codon. This phenomenon allows a single tRNA species to solve completely the problem of translating different codons that specify the same amino acid residue. For example, a tRNA with the anticodon containing inosinate (I) at the wobble position can base pair with the codons UUU and UUC both of which code for the amino acid phenylalanine.