Answer:
Option B is correct "The resulting polypeptide would be composed of two alternating types of amino acid"
Step-by-step explanation:
In case of a poly-AC mRNA, it will encode two types of codons - ACA and CAC. The ACA codon translates to the amino acid Threonine whereas the CAC codon translates to the amino acid Histamine.
The notion of having a 1:1 ratio between genes and polypeptides is too simplistic and not in agreement with the observations made my scientists over the years.
A nucleotide from one codon does not overlap with the next, which means it is not read as part of the successive codon.
Hope that answers the question. Have a great day!