Which of the following would be considered an essential criterion for "life"?
a. accurate replication
b. heterotrophy
c. metabolism
d. multicellularity
e. A and C
Answer: e. A and C
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When epinephrine binds to its G-protein linked receptor ____ is activated producing ___.
A. phospholipase C, diacylglyceride B. kinase, calcium C. kinase, transcription factor D. enzyme linked receptors, protein kinase E. adenylyl cyclase, cAMP
The scientist who published On the Origin of Species by Means of Natural Selection in 1859 was
A. Georges-Louis Buffon. B. Charles Darwin. C. Charles Lyell. D. James Hutton. E. Jean Lamarck.
The recent appearance of antibiotic-resistant strains of bacteria is an example of
A) the action of memory cells. B) evolution by natural selection. C) natural immunity. D) inflammation.
Which of the following antimicrobial agents is the most toxic to humans?
A) 70% alcohol B) ethylene oxide C) quaternary ammonium compounds D) chloramines E) iodophors