NEET Botany Molecular Basis of Inheritance Questions Solved


(a) What are the transcriptional products of RNA polymerase III?

(b) Differentiate between 'Capping' and 'Tailing'.

(c) Expand hnRNA.                                                              3 mark

(a) RNA polymerase III is responsible for transcription of tRNA, 5srRNA and snRNAs (small nuclear RNAs).

(b) Capping. In capping an unusual nucleotide (methyl guanosine triphosphate) is added to the 5-end of hnRNA.

Tailing. In tailing adenylate residues (200-300) are added at 3'-end of hnRNA.

(c) hnRNA - Heterogenous nuclear RNA.                                              3 mark

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