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NEETZoologyMolecular Basis of Inheritance

Read the following statements regarding transcription machinery and choose the incorrect statement.

Options

  1. AIn bacteria, the transcription of mRNA, tRNA, and rRNA is catalyzed by three distinct DNA-dependent RNA polyme
  2. BEukaryotic cells possess RNA polymerase in their organelles in addition to the polymerases present in the nucl
  3. CIn the eukaryotic nucleus, RNA polymerase III is responsible for the transcription of 5S rRNA, tRNA, and snRNA
  4. DRNA polymerase I in eukaryotes is responsible for transcribing 28S, 18S, and 5.8S rRNAs.

Correct answer

A. In bacteria, the transcription of mRNA, tRNA, and rRNA is catalyzed by three distinct DNA-dependent RNA polyme

Step-by-step solution

In prokaryotes (bacteria), there is a single DNA-dependent RNA polymerase that catalyzes the transcription of all types of RNA (mRNA, tRNA, and rRNA). Therefore, the statement claiming bacteria have three distinct RNA polymerases is incorrect. In eukaryotes, there are at least three RNA polymerases in the nucleus (Pol I, II, and III) showing a clear division of labour. Pol I transcribes rRNAs (28S, 18S, and 5.8S), Pol II transcribes hnRNA, and Pol III transcribes tRNA, 5S rRNA, and snRNAs. Additionally, eukaryotes

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