Which of the following is not considered to be part of an adaptive immune response?
a. phagocytic cells e. antigen receptors
b. antigen-presenting cells f. complement activation
c. histamines g. antibodies
d. cytokines h. none of these
H
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Charles Darwin's observations while aboard the HMS Beagle led eventually to the:
a. idea that life started on land. b. theory that life's origin was in fresh water. c. theory for the process that causes evolution. d. re-birth of marine biology. e. idea that life could not survive in the deep sea.
Seed plants
a. have alternation of generations. b. are heterosporous. c. develop a seed coat. d. are all of the above.
The sense of euphoria from low doses of barbiturates is chiefly due to __________.
A. an inhibition of the respiratory centers in the medulla B. a disinhibition of the cerebral cortex C. an inhibition of the reticular formation D. an excitation of the limbic system
Which of the following methods would be the most suitable to assess whether your protein exists as a monomer or in a complex?
(a) gel-filtration chromatography (b) gel electrophoresis (c) western blot analysis (d) ion-exchange chromatography