Explain how antibiotics are used to treat bacterial infections. What are some of the problems concerning the use of these drugs?
What will be an ideal response?
Antibiotics work in a variety of ways, including inducing the bacterial cells to burst. Some antibiotics target the cell walls of bacteria; because animal cells lack cell walls, these antibiotics won't kill human cells. Other antibiotics interfere with bacterial protein synthesis; this works because ribosome structure is different in bacteria and animal cells. A major problem is the development of bacterial strains that are resistant to antibiotics. This results from the overuse and misuse of antibiotics.
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In African cichlid fish, ____ regulates neurons that control sexual and aggressive behavior
a. testosterone
b. estrogen c. androgen d. gonadotropin-releasing hormone e. follicle-stimulating hormone
Asexual reproduction is indicated by letter
a. A. b. B. c. C. d. D. e. E.
Each of the following target bacterial ribosomes, except ________.
A. tetracycline B. polymyxins C. erythromycin D. gentamycin E. streptomycin
Which of the following could be used to demonstrate a homeostatic mechanism?
a. city buses transporting people from their houses to their jobs b. water stored behind a dam being released to make electricity c. a hot water heater keeping the water temperature near 100 degrees d. a series of underground passageways connected to a large building e. the seasonal changes that occur in the daily temperature