Outer membrane transport proteins are called_____ and found only in_______:
A. Peptidoglycan==Gram Positive
B. glycocalyx==Gram Negative
C. Porins==Gram Negitive
D. Periplasm==Gram Negative
E. LPS==Gram Negative
Ans: C. Porins==Gram Negitive
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Engulfing-phagocytic cells of innate immunity of vertebrates include _____
I) neutrophils II) macrophages III) dendritic cells IV) natural killer cells A) I and III B) II and IV C) I and IV D) I, II, and III E) I, II, III, and IV
Reverse transcriptase copies
A. DNA to DNA. B. DNA to RNA. C. RNA to DNA D. RNA to RNA.
Studies have determined that all of the following except ______ are responsible for the cyclical rise
and fall of arctic hare and lynx populations.
a. predation b. a limited food supply for hares c. predation by other mammals d. intraspecies competition e. disease
The loading of dissolved sugars into the sieve tube elements of phloem is:
a. passive transport. b. active transport. c. osmosis. d. simple diffusion. e. facilitated diffusion.