Question

a part of an mrna has the base sequence gca. which change to this sequence would indicate a missense mutation? messenger rna codons

Explanation:

A missense mutation is a point - mutation where a single nucleotide change results in a codon that codes for a different amino acid. The original codon GCA codes for alanine (Ala). GAA codes for glutamic acid (Glu), GUA codes for valine (Val), and GGA codes for glycine (Gly). Each of these changes would result in a different amino acid being incorporated into the polypeptide chain during translation, indicating a missense mutation.

Answer:

A. GAA
B. GUA
C. GGA