Question

A single mutation has occurred in the following DNA sequence. 5 ATG AAA TTA CCA 3 wild-type (normal) sequence 5 ATG AAG TTYou will require the following genetic code to answer this question. Second letter U с A G UCU Phe UCC UGU|Cys UUU UUC UUA UU

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Answer #1

A, as Adenine is replaced by Guanine in 2nd codon , so this substitution is transition type(one purine is replaced by another purine).

B, AAA and AAG both code for lysine amino acid so there is no change in amino acid sequence of protein. This mutation is silent as no effect.

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