Question

A plasmid _____________________________ . A. can confer antibiotic resistance to a bacterium. B. is a single-stranded circular DNA molecule that can undergo horizontal transfer among bacteria. C. is a tool designed in the lab and never found in naturally occurring bacteria. D. always becomes part of the bacterial chromosome during transformation.

Answer 1

Answer:

The correct answer will be option A.

Explanation:

The bacteria organize its genetic material in the single circular chromosome suspended in the cytosol along with additional circular double-stranded DNA molecule called plasmid.

The plasmid is present as a separate structure in the cytoplasm which performs important functions during stressful conditions in the bacteria like providing antibiotic resistance to the bacteria, formation of filial factors during conjugation and many others.

The plasmid which confers resistant to the bacteria is known as the R-plasmid. The R-plasmid consists of r-determinants which confers antibiotic resistance to the bacteria and resistance transfer factor (RTF) which helps in plasmid transfer.

Thus, option A is the correct answer.