A ________ agent is a chemical that inhibits bacteria from reproducing, but does NOT necessarily kill them.
A. bacteriocidal
B. bacteriostatic
C. bacteriolytic
D. xerophilic
Ans: B. bacteriostatic
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As described in "A Note About Bacterial Reproduction -- and the "Culture Bias,"" the organism Epulopiscium does not divide by binary fission. Rather, each cell increases in size and divides to produce multiple daughter cells that are held within the original cell well. After lysis, those daughters are released to repeat the process. Assuming Epulopiscium could be grown in pure culture in the laboratory in broth and on solid media (it currently cannot), which method would be best for measuring the increase in biomass during growth?
A. Direct microscopic count; the experimenter can directly count the number of cells and extrapolate to the biomass. B. Turbidity readings from a spectrophotometer; the increase in biomass will directly vary with the turbidity of the culture. C. Chemostat growth; it will prevent the culture from entering the death phase. D. The viable plate count; each colony derives from a single cell and the number of colonies equals the number of cells.
What is the genetic makeup of an individual who has inherited Jacobs syndrome?
A. XXX B. XYY C. XXY D. XO E. none of these
What is Electroporation? What does it do?
What will be an ideal response?
RNA is thought to be the original polymer because it can ________ like proteins and ________ like DNA.
A. catalyze reactions, self replicate B. store information; catalyze reactions C. catalyze reactions; store information D. self replicate; catalyze reactions