Read the following statements regarding the transcription and processing of RNA: Statement I: In tailing, 200-300 adenylate residues are added at the 3' end in a template-dependent manner. Statement II: Capping involves the addition of methyl guanosine triphosphate at the 5' end of hnRNA. Statement III: The process of splicing represents the dominance of the RNA-world. Statement IV: In prokaryotes, mRNA requires spli

Step-by-step solution

Statement I is incorrect because during tailing, adenylate residues (200-300) are added at the 3' end of hnRNA in a template-independent manner, not template-dependent. Statement II is correct as capping involves the addition of an unusual nucleotide, methyl guanosine triphosphate, to the 5' end of hnRNA. Statement III is correct. According to NCERT, the split-gene arrangements and the process of splicing represent an ancient feature of the genome and the dominance of the RNA-world. Statement IV is incorrect becaus