Question

a part of an mrna has the sequence aaa. use the table below to figure out which amino acid is coded for by aaa, then use the table to figure out which change to this sequence would indicate a silent mutation.
messenger rna codons
a. aac
b. uaa

Explanation:

Step1: Identify amino - acid for AAA

From the table, the codon AAA codes for Lysine.

Step2: Define silent mutation

A silent mutation is a change in the DNA or RNA sequence that does not result in a change in the amino - acid sequence. Since AAA and AAG both code for Lysine, a change from AAA to AAG is a silent mutation. Among the given options, AAC codes for Asn and UAA is a stop codon.

Answer:

None of the above options are correct for the silent - mutation part. But the amino - acid coded for by AAA is Lysine.