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Practice question

MCQ

Question

A bacterium possesses a small circular DNA molecule in addition to its genomic DNA. Which conclusion is correct?

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Choose one · Correct answer highlighted

It is a plasmid that may confer a characteristic such as antibiotic resistance. Correct It is a nucleolus responsible for ribosomal RNA synthesis. It is a lysosome containing hydrolytic enzymes. It is a chromosome enclosed by a nuclear membrane.

Explanation

Plasmids are small circular DNA molecules present outside the genomic DNA in many bacteria. They may confer distinctive phenotypic characters, such as resistance to antibiotics.

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