Question

How many amino acids will be there in the polypeptide chain formed on the following mRNA?

5'GCCACAUGGAGAUGACGACAAAAUUUUACUAGAAAA3'

Answer 1

The polypeptide chain will have 8 amino acids.

Explanation:

1. Identify the Start Codon:

   • The sequence AUG is the start codon, initiating translation.

2. Divide into Codons After Start Codon:

   • Codons: AUG GAG AUG ACG ACA AAA UUU UAC
   • UAG is a stop codon, so translation stops here.

3. Count the Amino Acids:

   • The 8 codons before the stop codon translate into 8 amino acids.

Thus, the polypeptide chain contains 8 amino acids before termination.