Answer :

One particular function that the codons (UAA, UGA or UAG) serve during protein synthesis is that they act in chain termination.

In the field of genetics, a codon can be described as a sequence made from three nucleotides for which there are complementary anticodons. For the making of a protein, the codons join with their complementary anti-codons until a termination codon arises. The termination codon stops this process and a protein will be formed.

The codons UAA, UGA or UAG are the chain termination codons. When they appear in the sequence, it means that the translation process will stop there. These codons act as the ending signals of a polypeptide chain. Hence, the codons UAA, UGA or UAG serve as chain terminators during protein synthesis.

Without the chain terminators, the process of translation will not stop and proteins will not be formed.

Although a part of your question is missing, you might be referring to this question:

What is one particular function that the codons (UAA, UGA, Or UAG)  serve during protein synthesis?

a. UAA, UGA, or UAG are initial codons, not termination codons.

b. They act in chain termination

c. They provide a substrate for the addition of the initiator amino acids.

d. They allow the mRNA to assume a variety of linear conformations.

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