Bacteria share similar pathways or strategies to effect resistance to antimicrobial agents. Which of the following is not a common pathway used by microorganisms?
A) enzymatic destruction or alteration of the antibiotic
B) altered antibiotic target
C) decreased cellular uptake or accumulation of the drug
D) altered environmental pH
Ans: D) altered environmental pH
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Bacterial cells are placed into a 250mL liquid growth medium in a closed laboratory flask. According to Malthusian theory, they will reproduce exponentially and then:
A. continue reproducing arithmetically as long as there are no limitations on food supply. B. continue reproducing geometrically as long as there are no limitations on food supply. C. continue reproducing arithmetically until the food supply is used up, then they will cease to grow. D. continue reproducing geometrically until the food supply is used up, then they will cease to grow.
The upper sandy beach often ends:
a. where sand dunes begin. b. where terrestrial vegetation begins. c. at the high tide line. d. both a and b e. both b and c
Cockroach feces and shed skins can cause a severe inflammatory response in the bronchioles and muscle spasms in the bronchiole smooth muscles. This disorder is known as ________
A) laryngitis B) emphysema C) asthma D) TB
Painful swelling and rapidly spreading subcutaneous tissue necrosis is characteristic of a wound infection by
A) Clostridium perfringens. B) Clostridium tetani. C) Mycobacterium leprae. D) Bacillus anthracis. E) Clostridium difficile.