NEET BIOLOGY

BIOLOGICAL CLASSIFICATION

VIRUSES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When antibiotics were first developed, most infectious diseases could be controlled by them. Today, certain bacteria are resistant to many antibiotics. One possible explanation for this change is that
A
the antibiotics killed most of the bacteria that did not have a genetic variation for resistance
B
the bacteria needed to change in order to produce more antibiotics
C
some of the bacteria learned how to resist the antibiotics
D
antibiotics have become weaker over the years
Explanation: 

Detailed explanation-1: -The first sign of antibiotic resistance became apparent soon after the discovery of penicillin. In 1940, Abraham and Chain reported that an E. coli strain was able to inactivate penicillin by producing penicillinase [20].

Detailed explanation-2: -It was used widely for treating soldiers during World War II, curing battlefield wound infections and pneumonia. By the mid-to late 1940s, it became widely accessible for the general public.

Detailed explanation-3: -Antimicrobial resistance is accelerated when the presence of antibiotics and antifungals pressure bacteria and fungi to adapt. Antibiotics and antifungals kill some germs that cause infections, but they also kill helpful germs that protect our body from infection. The antimicrobial-resistant germs survive and multiply.

Detailed explanation-4: -Bacteria can acquire antibiotic resistance genes from other bacteria in several ways. By undergoing a simple mating process called “conjugation, ” bacteria can transfer genetic material, including genes encoding resistance to antibiotics (found on plasmids and transposons) from one bacterium to another.

There is 1 question to complete.