Question

Antibiotic resistance occurs when bacteria are able to withstand the effects of the antibiotics designed to kill them. How does resistance against a newly developed antibiotic most likelyarise naturally in one species of bacteria?A. A random mutation occurs in the genetic sequence of a bacterial cell, which gives it resistance to the antibiotic.B.The need to adapt forces some bacteria to destroy the antibioticC.A scientist inserts a gene for antibiotic resistance into the DNA of several bacteria.D.The exposure to antibiotics causes some bacteria to secrete enzymes that fight against the antibiotics.

Answer 1

The correct answer is A. A random mutation occurs in the genetic sequence of a bacterial cell, which gives it resistance to the antibiotic. Random mutations allow bacteria to overcome antiboitics effects, since they allow the escape of the antibiotic target.