Which of the following tests allows the separation of cells according to their sizes, densities, and surface markers tagged by specific fluorescent antibodies?
A.
Western blot
B.
ELISA
C.
Fluorescence-activated cell sorter
D.
FA test on a microscope slide
C
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Antibiotics incorporated into the culture medium can
A. select against organisms that have not incorporated the plasmid. B. select against organisms that have incorporated a plasmid not containing the desired gene. C. select against organisms that have not incorporated the plasmid and select against organisms that have incorporated a plasmid not containing the desired gene D. enhance production of recombinant proteins.
Hyperpolarization of the postsynaptic nerve terminal
A) decreases the chance that an action potential will be initiated. B) increases the chance that an action potential will be initiated. C) does not affect the initiation of an action potential. D) is stimulated by an influx of calcium ions. E) none of the above
Iridium is an element that provides evidence of an asteroid collision with Earth
1.True 2.False
Compare and contrast the cyclic and noncyclic electron transport pathways of photosynthesis. What will be an ideal response?