BIOLOGY IN HUMAN WELFARE
HUMAN HEALTH AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A lessened
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B blocked
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C developed
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D defined
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Detailed explanation-1: -Biological Mutations Through mutation and selection, bacteria can develop defense mechanisms against antibiotics. For example, some bacteria have developed biochemical “pumps” that can remove an antibiotic before it reaches its target, while others have evolved to produce enzymes to inactivate the antibiotic.
Detailed explanation-2: -The main steps in the development of antibiotic resistance in bacteria are: A random mutation occurs in the DNA of individual bacterial cells. The mutation protects the bacterial cell from the effects of the antibiotic-it becomes antibiotic resistant. Bacteria without the mutation die when the antibiotic is present.
Detailed explanation-3: -Bacterial species evolve quickly both because their huge populations offer many opportunities for mutations, and because they readily exchange genetic information, even between species.
Detailed explanation-4: -Bacteria evolve resistance to antibiotics by one of two routes: spontaneous mutation and horizontal gene transfer.