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NEET Biology question

BiologyMolecular Basis of InheritanceNEET

Choose the correct statement(s) about eukaryotic RNA polymerases and ribosome structure. I. In eukaryotes, a single RNA polymerase transcribes mRNA, tRNA and rRNA. II. RNA polymerase-I transcribes = 28S, 18S, 5.8S rRNA III. RNA polymerase-III transcribes = 5S rRNA and tRNA IV. RNA polymerase-II transcribes = hnRNA V. Ribosomal large subunit has P and A site

Answer: (A)

Solution

Unlike prokaryotes (which use a single RNA polymerase for all RNA types), eukaryotes have at least three distinct RNA polymerases, so Statement I is false. RNA polymerase I transcribes the 28S, 18S and 5.8S rRNAs (II, true); RNA polymerase III transcribes 5S

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Question ID VK-120759