Question

Bacterial resistance to antibiotics is a genetic trait, it is normally carried by the

• A. Centromere
• B. Plasmid
• C. Chromosome
• D. Intron

Answer 1

The correct option is B Plasmid

• The plasmid is an extrachromosomal material in bacteria and used as a carrier DNA because it has an antibiotic resistance gene which makes it easy to isolate the transformed cell with the desired insert in it.
• The plasmid genes confer resistance to one or more antibiotics. They have the ability to transfer by conjugation between bacterial species and are significantly involved in the emergence and dissemination of multiple drug resistance associated with bacterial infections in humans.
• The transfer of a copy of plasmid from resistant to sensitive bacteria provides the capability of drug resistance.

Thus, the correct answer is option B.