Cholesterol
A) is found in abundance in prokaryotic cell membranes.
B) intercalates between the fatty acid chains within the bilayer.
C) increases permeability for small cations.
D) destabilizes the cell membrane.
E) is found only in plants.
B) intercalates between the fatty acid chains within the bilayer.
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Which one of the following cell types would likely have the most extensive system of smooth endoplasmic reticulum?
A. skin cells B. pancreatic cells that secrete digestive enzymes C. testicular cells D. central nervous system cells E. muscle cells
In marine birds, excess salts are removed by:
a. salt glands in the tongue. b. salt glands above the eyes. c. concentrated urine. d. salt glands on the skin. e. salt glands in the mouth.
What is one characteristic that archaea and eukaryotes share?
a. horizontal gene transfer b. chemoautotrophs c. organize DNA around histone proteins d. multiple plasmids e. similar cell wall components
The adrenal glands consist of an inner adrenal --------and the outer adrenal--------.
Fill in the blank(s) with the appropriate word.