NEETZoologyMolecular Basis of Inheritance
Select the incorrect statement for the given figure.
Options
- AThe RNA polymerase I transcribes rRNAs (28S, 18S, and 5.8S), whereas the RNA polymerase III is responsible for
- BIn tailing, adenylate residues (200-300) are added at 3'-end in a template independent manner.
- CIn capping an unusual nucleotide (methyl adenosine triphosphate) is added to the 5'-end of hnRNA.
- DThe RNA polymerase II transcribes precursor of mRNA, the heterogeneous nuclear RNA (hnRNA).
Correct answer
C. In capping an unusual nucleotide (methyl adenosine triphosphate) is added to the 5'-end of hnRNA.
Step-by-step solution
In eukaryotes, there are two additional complexities – (i) There are at least three RNA polymerases in the nucleus (in addition to the RNA polymerase found in the organelles). There is a clear cut division of labour. The RNA polymerase I transcribes rRNAs (28S, 18S, and 5.8S), whereas the RNA polymerase III is responsible for transcription of tRNA, 5srRNA, and snRNAs (small nuclear RNAs). The RNA polymerase II transcribes precursor of mRNA, the heterogeneous nuclear RNA (hnRNA). (ii) The second complexity is that t