Normal E. coli do not carry resistance against which of these antibiotics.
Ampicillin
Tetracycline
Chloramphenicol
All of above
Ampicillin is an antibiotic that is used to treat bacterial infections such as ear infections.
Tetracycline is an antibiotic that is used to treat bacterial illnesses like cholera and acne.
Chloramphenicol is an antibiotic that is used to treat bacterial infections such as eye infections.
All of these antibiotics are used to kill or inhibit bacterial growth. Normal E. coli cells are not resistant to any of the drugs listed below. However, E. coli plasmids are genetically modified, and genes carrying antibiotic resistance are integrated within the plasmid, and this genetically engineered plasmid is transformed into host cells.
Option a is the correct answer.