The 5'-Terminal Cap Structure of Eukaryotic MRNAs Is A(n):
A) $\rightarrow$

The 5'-terminal cap structure of eukaryotic mRNAs is a(n) :

A) 7-methylcytosine joined to the mRNA via a 2',3'-cyclic linkage.
B) 7-methylguanosine joined to the mRNA via a 5' $\rightarrow$ 3' diphosphate linkage.
C) 7-methylguanosine joined to the mRNA via a 5' $\rightarrow$ 5' triphosphate linkage.
D) N⁶-methyladenosine joined to the mRNA via a 5' $\rightarrow$ 5' phosphodiester bond.
E) O⁶-methylguanosine joined to the mRNA via a 5' $\rightarrow$ 5' triphosphate linkage.