A proteasome is a
a. vesicle containing proteolytic enzymes.
b. precursor to lysosomes.
c. complex of a proteolytic enzyme and the protein that is being degraded.
d. multisubunit protease complex that degrades proteins marked for destruction.
Ans: d. multisubunit protease complex that degrades proteins marked for destruction.
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The bacterial viruses that are released by a process termed extrusion are called
A. lysogenic viruses. B. temperate phages. C. filamentous phages. D. lambda viruses.
The drug mifepristone (RU-486) is a contraceptive that ____
a. blocks passage of sperm through the male reproductive tract b. blocks passage of sperm through the female reproductive tract c. prevents ovulation d. causes shedding of the endometrial lining and any implanted embryo e. prevents implantation by blocking estrogen receptors in the uterus
Substances that are recognized as foreign and provoke immune responses are called ________.
A. infective agents. B. inducers. C. antigens. D. antibodies.
The neurotoxin that Taricha spp. possess to ward off predators is
A) TTG. B) taricha venom. C) tetrodotoxin. D) thamnophis poison.