5′ capping of mRNA transcripts in eukaryotes involves the following events:

Q. 5′ capping of mRNA transcripts in eukaryotes involves the following events:

P. Addition of GMP on the 5¢ end

Q. Removal of g-phosphate of the triphosphate on first base at the 5¢ end

C. 5′-5′ linkage between GMP and the first base at 5¢ end

S. Addition of methyl group to N7 position of guanine

Which one of the following is the correct sequence of events?

(A) P, Q, R, S                                      

(B) P, R, Q, S

(C) Q, P, R, S                         

(D) Q, P, S, R

Ans: Q, P, R, S