Figure 15.6 Use the figure to answer the following question(s).

-Refer to Figure 15.5.If you had an mRNA for which the codons were read beginning from the start codon,which amino acids would be added (in order)? UCUGAUGGGCUUU…
A)serine,aspartic acid,glycine,leucine
B)methionine,glycine,phenylalanine
C)methionine,valine,glycine,phenylalanine
D)threonine,methionine,glycine

Question

Figure 15.6 Use the figure to answer the following question(s).
 
-Refer to Figure 15.5.If you had an mRNA for which the codons were read beginning from the start codon,which amino acids would be added (in order)? UCUGAUGGGCUUU…
A)serine,aspartic acid,glycine,leucine 
B)methionine,glycine,phenylalanine 
C)methionine,valine,glycine,phenylalanine 
D)threonine,methionine,glycine

Quizplus · Accepted Answer

Reading the mRNA sequence UCUGAUGGGCUUU in triplets, we get UCU (serine), GAU (aspartic acid), GGC (glycine), UUU (phenylalanine). However, the question specifies that we start at the start codon, which is AUG. So, the first triplet to be read is AUG, which codes for methionine. Therefore, the correct sequence of amino acids added is methionine, glycine, phenylalanine, which corresponds to answer choice B.

Figure 156 Use the Figure to Answer the Following Question(s)