Most of the active functions of plasma membranes are carried out by ____
a. cholesterol
b. proteins
c. hydrophilic heads
d. hydrophobic tails
e. carbohydrates
ANSWER: b
Biology & Microbiology
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Transport proteins _____
a. are found only in eukaryotic cells b. allow only small molecules and ions to cross the membrane c. are required for small nonpolar molecules to cross the membrane d. allow ions and polar molecules to cross the membrane e. are peripheral membrane proteins
Biology & Microbiology
The resting membrane potential is indicated by
a. A. b. B. c. C. d. D. e. E.
Biology & Microbiology
A_____ infection is an infection that occurs as a complication of a pre-existing one
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
A relationship in which two species intereact and
both benefit is a. neutral. b. commensalism. c. competitive exclusion. d. mutualism. e. parasitism.
Biology & Microbiology