Discussion
Plasmid that carries genes encoding enzymes, which degrade substances such as aromatic compounds, pesticides or sugar are
Answer: B
Correct answer: metabolic plasmid
Plasmids carrying genes for enzymes that degrade aromatic compounds, pesticides or unusual sugars are metabolic, or degradative, plasmids. The best known are the catabolic plasmids of Pseudomonas - TOL for toluene and xylene, CAM for camphor, OCT for octane - which let the host grow on substrates most bacteria cannot use.
They matter in bioremediation, since the capability can be transferred to other organisms. An F factor is concerned with conjugation and a virulence plasmid with pathogenicity; neither extends the cell's metabolic range.
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