Where on a neuron would you expect to find myelin?
A. round the dendrites
B. at the axon hillock
C. along the axon
D. at the synapse
C
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When tumor cell DNA is examined from people at different stages of the same cancer type, mutations that are common to all of them
A) act early in the disease. B) act late in the disease. C) acted on an initial cell and then reverted to wild type. D) entered the cells on the same type of virus.
Adipose cells secrete __________, a(n) __________
that acts on the __________ to help control appetite. a. ghrelin; enzyme; stomach b. leptin; enzyme; brain c. leptin; hormone; brain d. ghrelin; hormone; stomach e. ghrelin; hormone; brain
The effect of colcemid on cells is to stop division at anaphase. Indicate whether the statement is true or false
In the experiment in which Frye and Edidin fused the plasma membranes of a mouse and a human cell,
what happened to the membrane proteins? a. They formed a spherical structure. b. They formed a bilayer. c. They moved laterally across the cell surface. d. They flip-flopped from one layer to the other. e. They reacted with cholesterol molecules on the membrane surface.