What mRNA modification, just 5'to the start codon, is used by the eukaryotic cell to enable location of the first AUG codon?
A)a sequence of UAUAUA
B)a short sequence that forms a hairpin loop
C)a GC "box" that is recognized by eIFI
D)a string of four to five O-methylguanine residues
E)7-methylguanine cap on the 5' end of the mRNA

Question

Quizplus · Accepted Answer

The 7-methylguanine cap on the 5' end of the mRNA is the modification that enables the eukaryotic cell to locate the first AUG codon. It allows the mRNA to bind to the ribosome and initiates translation. The other options listed do not serve this specific purpose.

What MRNA Modification, Just 5'to the Start Codon, Is Used