A vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid. This statement describes _____.
a. facilitated diffusion
b. active transport
c. simple diffusion
d. endocytosis
e. exocytosis
Ans: e. exocytosis
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In normal cells, p53 protein acts as
A) a signal transducer. B) a tumor suppressor. C) a proto-oncogene activator. D) a GTPase inhibitor. E) None of these
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