# GATE2018-40

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

1. Addition of GMP on the $5'$ end
2. Removal of $\gamma$-phosphate of the triphosphate on first base at the $5'$ end
3. $5'-5’$ linkage between GMP and the first base at $5'$ end
4. Addition of methyl group to $N7$ position of guanine

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

1. P, Q, R, S
2. P, R, Q, S
3. Q, P, R, S
4. Q, P, S, R

edited