Biology · Molecular Biology

With reference to enzymes involved in RNA synthesis, consider the following statements: I. An enzyme that synthesises RNA using a DNA template is found in all cellular organisms and is essential for transcription. II. An RNA-synthesising enzyme that uses RNA as its template is predominantly associated with viral life cycles rather than normal cellular processes. III. In eukaryotic cells, the formation of messenger RNA does not involve RNA-dependent RNA polymerase. Which of the statements given above are correct?