An unidentified cell was found to contain introns and exons.It also expresses DNA polymerase and RNA polymerase.Although it exhibits a promoter region, it has no operons.You conclude that this cell

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Quizplus · Accepted Answer

The presence of introns and exons, along with DNA and RNA polymerase and a promoter region, suggest that this cell is eukaryotic. Prokaryotes generally do not have introns and exons or a complex transcriptional machinery. The absence of operons is not a definitive characteristic of either prokaryotes or eukaryotes. The option of it being a virus is unlikely because viruses do not have introns and exons within their genome.

An Unidentified Cell Was Found to Contain Introns and Exons