Which of the following is/are type(s) of cytopathic effects?
A. Inclusions in the cytoplasm
B. Rounding of cells
C. Inclusions in the nucleus
D. Multinucleated giant cells
E. All of the choices are correct.
Answer: E
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A catalase test was performed from a sheep blood agar plate on a colony of streptococci, and bubbling was observed. Which of the following statements explains this discrepancy?
a. Catalase is the inappropriate test to use on colonies of streptococci; therefore the re-sults are invalid. b. The colony may have been contaminated with sheep red blood cells, causing a false-positive result. c. The colony was most likely enterococci, not streptococci. d. No discrepancy is present. Streptococcus is a catalase-positive colony.
In 1610, which scientist was imprisoned for publishing evidence that the Earth orbits the sun?
a. Aristotle b. Copernicus c. Galileo d. Darwin e. Newton
A steady, low-level contraction of a muscle is referred to as
a. tetanus. b. treppe. c. spasm. d. tone. e. fatigue.
In temperate deciduous forests, trees drop their leaves in response to reduced sunlight
Indicate whether the statement is true or false