The reagent used in the "string test" is:
a. bile solubility.
b. sodium deoxycholate.
c. bile esculin.
d. 0/129 (2,4-diamino-6,7-diisopropylpteridine).
B
The string test can be used to separate Vibrio spp. from Aeromonas spp. In this test, organisms are emulsified in 0.5% sodium deoxycholate, which lyses the vibrio cells but not those of the Aeromonas spp. Deoxyribonucleic acid (DNA) is released during cell lysis and can then be pulled up into a string using an inoculating loop.
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A) adult-onset diabetes. B) tuberculosis. C) Huntington's disease. D) chronic fatigue syndrome. E) Tay-Sachs disease.
Which groups of archaea are adapted to living in highly salty environments? a. Extreme thermophiles b. All of these choices
c. Methanogens d. None of these choices. e. Extreme halophiles
Which characteristic distinguishes animals from plants and fungi?
1.Eukaryotic cells 2.Multicellular 3.Cells lack cell walls 4.Motile at some point in the life cycle
Island populations are more vulnerable to
__________ than their mainland counterparts. a. storms b. disease c. droughts d. genetic drift e. all of these