Which of the following does not require 5'capping?
(A) tRNA of alanine (B) mRNA for histone (C) U6 snRNA (D) siRNA
(A) Ans: A. tRNA of alanineSmall nuclear RNAs contain a unique 5'-caps. Sm-class snRNAs are found with 5'-trimethylguanosine caps, while Lsm-class snRNAs are found with S'-monomethyl phosphate caps.mRNAs do have a 7-methylguanylate cap, abbreted m7G.tRNAs and rRNAs don't require 5' capping. They have other modifications.