With reference to processing of hn RNA, which of the following statements is/are INCORRECT?

A. Introns are removed and exons are joined directly splicing.

B. Capping & Tailing occurs at 5' end & 3' end respectively.

C. Addition of 200-300 adenylated residues means capping.

D. Addition of guanosine triphosphate takes place at 5' end.

E. Processing take place in the nucleus and converts hn RNA into functional RNA.

Choose the correct answer from the options given below:

C only

The correct answer is Option (2) -C only

In eukaryotes ,primary transcripts contain both the exons and the introns and are non-functional. Hence, it is subjected to a process called splicing where the introns are removed and exons are joined in a defined order.

hnRNA undergoes additional processing called as capping and tailing. In capping an unusual nucleotide (methyl guanosine triphosphate) is added to the 5'-end of hnRNA.

In tailing, adenylate residues (200-300) are added at 3'-end in a template independent manner.

It is the fully processed hnRNA, now called mRNA, that is transported out of the nucleus for translation.