In the figure above, representing transcription, the item labeled "C" is
a. the nontemplate strand.
b. RNA-DNA hybrid.
c. the template strand.
d. DNA double helix.
e. the RNA copy.
E
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The molarity of a solution is
A. a measure of solute concentration. B. the weight of a solid substance. C. often expressed as grams per unit volume. D. reflects a measure of the amount of oil dissolved in a water. E. a scientific term for determining the solubility of a substance in water.
Which of the following statements about the electron transport chain in cell respiration is CORRECT?
A. Electrons move from NADH to a chain of proteins with lower electronegativities. B. The electron transport chain of proteins uses ATP to pump H+ across the inner mitochondria membrane against its electrochemical gradient. C. The loss in free energy of the electron initially donated by NADH is used to transport H+ across the inner mitochondrial membrane against its electrochemical gradient. D. The electron transport chain of proteins contains pores that are leaky to H+. E. The ATP synthase pump generates a H+ gradient across the inner mitochondrial membrane.
Of the following specialized procedures, which may be used with the electron microscope?
A) shadowing with gold B) negative staining C) scanning electron microscopy D) freeze fracturing E) all of the above
A researcher is attempting to determine the prevalence of asymptomatic human infection with West Nile virus in New York City. Which of the following would be most useful?
A. Detection of IgG against WNV B. Viral culture in embryonated eggs C. Detection of IgM against WNV D. Tissue culture E. Electron microscopy