Question

the chart below shows codons found in messenger rna.
a strand of mrna containing the repeating sequence aaguccaagucc could code for which of the following amino acid sequences?
a. lys - ser - lys - ser
b. lys - arg - lys - arg
c. ser - lys - ser - lys
d. arg - ser - arg - ser

Explanation:

Step1: Identify Codons

The mRNA sequence is AAGUCCAAGUCC. Split into codons (3 - letter units): AAG, UCC, AAG, UCC.

Step2: Use Codon Table

• AAG: Codes for lysine (lys).
• UCC: Codes for serine (ser).

So the amino acid sequence is lys - ser - lys - ser.

Step3: Match with Options

Option A is lys - ser - lys - ser, which matches.

Answer:

A. lys - ser - lys - ser