Refer to the accompanying figure. Which label designates a bipolar cell?
a. 2
b. 3
c. 4
d. 5
e. 6
c
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The type of movement of molecules that is specific and passive, and which becomes saturated if all of the protein carriers are in use is
A. exocytosis. B. facilitated diffusion. C. active transport. D. endocytosis. E. osmosis.
Where would you expect to find the plus-end of a microfilament in a crawling cell?
A. near the plasma membrane of the leading edge of the cell B. near the plasma membrane of the trailing end of the cell C. near the cell center D. Answers a and b are both correct.
Which of the following proteins would you expect to be a coded for by a proto-oncogene?
A) a growth factor receptor B) a DNA repair protein C) a protein involved with the G1 checkpoint D) a caspase E) a DNA replication protein
Multicellular organisms with hard exoskeletons, segmented bodies and four pairs of jointed legs in the adult stage are
A) algae. B) arachnids. C) insects. D) helminths. E) lice.