Answered

An mRNA is 429 nucleotides long. The number of amino acids in the polypeptide chain formed from this mRNA is

A143.
B142.
C141.
D429.
E428.

Verified Answer :

B142. This is because one of the molecules has to be a stop codon which doesn't code for an amino acid. So there are only 426 nucleotides coding for the polypeptide chain. It takes 3 nucleotides to code for an amino acid. So 426 divided by 3 is 142, which is the amount of amino acids that will be part of this chain.

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