Clusters of sphingolipids, cholesterol, and membrane proteins that move together laterally in the plane of the plasma membrane are called lipid
a. boats.
b. barrels.
c. rafts.
d. barges.
Ans: c. rafts.
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The serine pathway and ribulose monophosphate pathway can both be used by ________ as a way to incorporate carbon into biomass
A) acetogens B) anoxygenic hydrocarbon fermenters C) methanogens D) methylotrophs
A group of chemicals that at low doses reduces
fatigue and heightens awareness but at high doses elicits anxiety and irritability are a. depressants. b. stimulants. c. analgesics. d. hallucinogens. e. antipsychotics.
Which three things do all living cells have in common?
a. a nucleus, cytoplasm, and a cell wall b. cytoplasm, a cell wall, and lysosomes c. a nucleus, ribosomes, and a cell membrane d. DNA, a cell membrane, and a nucleus e. a plasma membrane, DNA, and cytoplasm
Wings of birds and butterflies have similar functions, but different evolutionary origins. They are:
A. physiological structures. B. homologous structures. C. phylogenetic structures. D. analogous structures.