A bacterium that normally colonizes the skin gains access through a laceration and causes infection. This type of infection is classified as:
a. nosocomial.
b. opportunistic.
c. nonpathogenic.
d. immunogenic.
B
Although bacteria colonize the skin and are nonpathogenic to the host, they have the ability to cause infection if given the opportunity to penetrate the skin barrier and enter the host's system.
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_______ causes rhythmic contractions of cells in the mammary glands.
Fill in the blank(s) with the appropriate word(s).
Which of the following produces the most ATP when glucose (C6H12O6) is completely oxidized to carbon dioxide and water?
A) glycolysis B) fermentation C) oxidation of pyruvate to acetyl CoA D) citric acid cycle E) oxidative phosphorylation (chemiosmosis)
Cultures of a bacterial strain were incubated in a standard incubator, in an anaerobic jar, and in a candle jar. After incubation, there was moderate growth of cultures in the candle and anaerobic jars, but heavy growth of the culture in the incubator. This species is a(n) ________.
A. facultative anaerobe B. obligate aerobe C. anaerobe D. microaerophile E. capnophile
The largest bone in the human body is the _____
a. pelvis b. tibia c. ulna d. femur e. skull