Assume that the nudeotide at the 5^' end of the first tRNAs...

Assume that the nudeotide at the $5^{\prime}$ end of the first tRNAs anticodon (the tRNA on the left) in Figure 15.11 were mutated from $G$ to U. Give all codons with which the new, mutated anticodon could pair.

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Key Concepts

Codon–Anticodon Pairing

This concept involves the process during translation in which a codon on mRNA interacts with a complementary anticodon on tRNA. The matching of nucleotide bases follows the standard base pairing rules, which is central to accurately translating the genetic code into the correct sequence of amino acids during protein synthesis.

Wobble Hypothesis

The wobble hypothesis explains the phenomenon where the base at the 5? end of the tRNA anticodon (which pairs with the 3? end of the mRNA codon) can exhibit relaxed base pairing rules. This flexibility allows a single tRNA to recognize and bind to multiple codons that differ in their third nucleotide, thereby contributing to the degeneracy of the genetic code.

Mutation Effects in tRNA Anticodon

Mutations in the tRNA anticodon, such as changing a specific nucleotide at the wobble position, can alter the pattern of codon recognition. A mutation may change which mRNA codons are properly paired by the affected tRNA, thereby impacting protein synthesis. This concept highlights the importance of both the accuracy of base pairing and the inherent flexibility provided by wobble pairing in the translation process.

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