Question

Normal E. coli cells carry resistance against which of the following antibiotics?

• A. Chloramphenicol
• B. Ampicillin
• C. Tetracycline
• D. None of these

Answer 1

The correct option is D None of these

A. Chloramphenicol is an antibiotic used to treat bacterial infections such as eye infections.

B. Ampicillin is an antibiotic used to treat bacterial infections such as ear infections.

C. Tetracycline is an antibiotic used to treat bacterial infections such as cholera, acne etc.

All these antibiotics are used to kill or inhibit the growth of bacteria. Normal E. coli cells do not carry resistance against any of the following antibiotics. However, the plasmids of E. coli are genetically modified and genes carrying resistance for these antibiotics is integrated within the plasmid and this genetically engineered plasmid is transformed into host cells.

So, the correct answer is 'None of the above'.