What is the mechanism of action for the antihelminthic drug praziquantel?
A) interferes with glucose uptake by targeting microtubules
B) paralyzes the parasites
C) blocks anaerobic energy metabolism in protozoa
D) targets nucleic acids
E) the mechanisms of action are unclear
Answer: B
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The first intelligence tests, developed in the late 19th century, tested a person's
A) mathematics and verbal skills. B) sensory perception and reaction time. C) problem-solving and logic skills. D) hand-eye coordination.
A gaseous hormone produced by plants that helps control fruit ripening is
A. carbon dioxide. B. auxin. C. ethylene. D. chlorophyll. E. carotene.
After a steroid hormone binds its receptor, the hormone-receptor complex then:a
activates a G protein. b. activates a protein kinase. c. activates adenylyl cyclase. d. activates calmodulin. e. binds DNA.
Bacteria divide by
a) binary fission. b) spore formation. c) mitosis. d) budding.