Question

use the codon chart below
codons found in messenger rna
a strand of mrna containing the repeating sequence aagaagaagaag could code for which of the following amino acid sequences? (sc 912 l 16.5)
a. lys - lys - lys - lys
b. lys - arg - glu - lys
c. asn - asn - asn - asn
d. lys - arg - lys - arg

Explanation:

Step1: Divide mRNA into codons

The mRNA sequence is AAGAAGAAGAAG. Divide it into codons (groups of 3 bases). So, we have AAG - AAG - AAG - AAG.

Step2: Look up codons in the chart

In the codon chart, for the first base A, second base A, third base G:
Looking at the row where the first base is A, then the column where the second base is A, and the sub - row where the third base is G. We find that the codon AAG codes for lysine (Lys).

Answer:

A. lys - lys - lys - lys