Which of the following is an example of pasteurization?
A) A public toilet is treated with disinfectants.
B) A surgeon washes her hands before surgery.
C) Heat is used to kill potential pathogens in apple juice.
D) An autoclave is used to prepare nutrient agar.
E) A nurse prepares an injection site with an alcohol swab.
C
Bloom's Taxonomy: Comprehension
Section: Basic Principles of Microbial Control
Learning Outcome: 9.2
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You are asked to determine whether an unknown tissue specimen comes from a plant or an animal
Closer inspection with an electron microscope reveals that the cells are connected by small openings lined by extensions of the cell membrane and containing tubules connecting the endomembrane systems of adjacent cells. Which of the following conclusions can be drawn from your observations? A. The openings are plasmodesmata, so the tissue must come from a plant. B. The openings are plasmodesmata, so the tissue must come from an animal. C. The openings are gap junctions, so the tissue must come from a plant. D. The openings are gap junctions, so the tissue must come from an animal. E. The openings could be either gap junctions or plasmodesmata, so it cannot be determined whether the tissue came from a plant or an animal.
B is an intron between two exons, A and C. Which representation best describes how this region of mRNA will appear after it is transcribed and processed by a spliceosome?
A) A-C B) A-B C) B-C D) A-B-C
Four of the five answers listed below are conditions related to diet. Select the exception
a. colon cancer b. kidney stones c. cardiovascular disorders d. obesity e. Alzheimer's disease
A viral infection which does not result in the production of new virions is ________ infection(s)
A) a lytic B) a latent C) a persistent D) a lysogenic E) either latent or lysogenic