Q Suppose that a gene underwent a mutation that changed a GA

Q: Suppose that a gene underwent a mutation that changed a GAA codon to UAA.

A-Name the amino acid encoded by the original triplet.

B-What amino acid could be encoded by the mutant tRNA?

C-What is the tRNA anticodon that could translate the nonsense UAA triplet.

Solution

(a) the amino acid encoded by the normal original code is Glutamic acid ..!!

(b) the amino acids coded by the mutant t-Rna is stop codon - Ochre..!!

(c) the t-Rna anti codon would be AUU..!!