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GATE2018-40

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$5'$ 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

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