The beginning of a strand of mRNA has the following base sequence: AUG_UUA_UAU_UGC_UUA_ACU_GUU_UAU. The polypeptide formed by the first seven steps of protein synthesis has the sequence Met-Leu-Tyr-Cys-Leu-Thr-Val. What is the next amino acid to be added to the polypeptide chain?
A)Cys
B)Leu
C)Met
D)Thr
E)Tyr

Question

Quizplus · Accepted Answer

The next codon in the mRNA sequence after those coding for Met-Leu-Tyr-Cys-Leu-Thr-Val is UAU, which codes for the amino acid Tyrosine (Tyr).

The Beginning of a Strand of MRNA Has the Following