Visible light has a wavelength range of:
A. 0.001-100,000 nanometers.
B. 200-740 nanometers.
C. 400-740 nanometers.
D. 200-800 nanometers.
E. 200-400 nanometers.
Answer: C
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"DNA footprinting" is a technique that can be used to identify:
A. a region of DNA that has been damaged by mutation. B. the position of a particular gene of a chromosome. C. the position of internally double-stranded regions in a single-stranded DNA molecule. D. the specific binding site of a repressor, polymerase, or other protein on the DNA. E. All of the choices given can be identified by this technique.
Member of the genus Cytophaga contribute significantly to the process of wastewater treatment.
Answer the following statement true (T) or false (F)
African sleeping sickness is caused by Trypanosoma brucei, a unicellular flagellated protist that infects red blood cells after being injected into the bloodstream. Trypanosoma brucei is which of the following?
A. a diatom B. an alga C. a protozoan D. a slime mold E. an apicomplexan
In the process of inflammation, the immediate and initial vasoconstriction in the precapillary arterioles is the result of neural impulse by the sympathetic system
a. true b. false