The beginning of a strand of mRNA has the following base sequence: AUGUUCUCUGAUGGCAAUUCU. The polypeptide formed by the first six steps of protein synthesis has the composition Met-Phe-Ser-Asp-Gly-Asn. What is the next amino acid to be added to the polypeptide chain?
A)Asn
B)Asp
C)Met
D)Phe
E)Ser

Question

Quizplus · Accepted Answer

The next codon in the sequence after AUG (Met), UUC (Phe), UCU (Ser), GAC (Asp), GGC (Gly), AAU (Asn) is UCU, which codes for Ser (Serine).

The Beginning of a Strand of MRNA Has the Following