One of the biggest issues of technology vs. natural selection is the rise of “super bugs”. What is it about our quickly changing world is contributing to this issue?
A) Habitat destruction is bringing more people into contact with pathogens previously isolated from human hosts.
B) Jet travel can send an infectious agent around the world in a day or two.
C) Climate change might prevent cold temperatures from killing the animal that carried the zoonotic disease (ex: winter killed the fleas that carried the microbe that caused the bubonic plague).
D) A&B
E) B&C
F) All of the above
Answer: F) All of the above
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Which of the following is an advantage of molecular pharming?
A. Proteins are more likely to function properly when expressed in bacteria. B. Certain proteins may be degraded rapidly when expressed in mammals. C. The yield of recombinant proteins in mammalian milk is quite large. D. Post-translational modifications do not occur in mammals. E. Proteins are more stable when expressed in bacteria.
Which of the following account for 20% of the greenhouse gases recorded annually?
a. deforestation of dry tropical forests b. deforestation of moist tropical forests c. burning of fossil fuels d. burning of coal e. urbanization
Inhibitors that fill the enzyme's active site and compete with the normal substrate are
a) noncompetitive. b) allosteric. c) competitive. d) conformational.
Please select functions of the lymphatic system to test your understanding of its characteristics and functions.
> Provides a route for the return of extracellular fluid to general circulation > Carries away excess fluid from inflamed tissue > Conducts surveillance, recognition, and protection against foreign materials through a system of lymphocytes, phagocytes, and antibodies > Contains red blood cells for the transport of oxygen and carbon dioxide > Located in intestinal tissue to enhance the digestion of ingested food Provides a route for the return of extracellular fluid to general circulation Carries away excess fluid from inflamed tissue Conducts surveillance, recognition, and protection against foreign materials through a system of lymphocytes, phagocytes, and antibodies