eukaryotic nuclei contain three types of RNA polymerases (I, II, and III) that exhibit a clear division of labour in transcribing different classes of RNA . RNA polymerase I transcribes rRNAs (28S, 18S, and 5.8S), RNA polymerase II transcribes the precursor of mRNA (hnRNA), and RNA polymerase III is responsible for transcribing tRNA, 5srRNA, and snRNAs . Mastery of these eukaryotic complexities is essential for medical entrance exams, as NCERT textbooks serve as the definitive primary source for approximately 95% of NEET Biology questions .