Wobble refers to which aspect of translation?

Wobble refers to which aspect of translation?

• A. The fact that the third codon base often codes for the same amino acid as other codons
• B. The requirement that all three codon bases must pair perfectly with the anticodon
• C. The early termination of translation at stop codons
• D. The role of ribosomal RNA in catalysis

Answer: (A)

Wobble is about flexibility in base pairing at the third position of the codon during translation. The genetic code is redundant, so many codons encode the same amino acid. This redundancy is enabled by wobble: the first and second bases of the codon pair more strictly with the anticodon, while the third base can tolerate nonstandard pairings. For example, G can pair with U at the third position, and some tRNAs use inosine in their anticodon to pair with A, U, or C. This flexibility allows a single tRNA to recognize multiple codons for the same amino acid, which helps translation proceed efficiently with fewer tRNA types. So the best answer captures that the third-base flexibility leads to multiple codons encoding the same amino acid. The other ideas describe different aspects: requiring perfect three-base pairing isn’t wobble, stop codons relate to termination, and ribosomal RNA’s catalytic role is a separate functional detail.

Wobble is about flexibility in base pairing at the third position of the codon during translation. The genetic code is redundant, so many codons encode the same amino acid. This redundancy is enabled by wobble: the first and second bases of the codon pair more strictly with the anticodon, while the third base can tolerate nonstandard pairings. For example, G can pair with U at the third position, and some tRNAs use inosine in their anticodon to pair with A, U, or C. This flexibility allows a single tRNA to recognize multiple codons for the same amino acid, which helps translation proceed efficiently with fewer tRNA types.

So the best answer captures that the third-base flexibility leads to multiple codons encoding the same amino acid. The other ideas describe different aspects: requiring perfect three-base pairing isn’t wobble, stop codons relate to termination, and ribosomal RNA’s catalytic role is a separate functional detail.