Which neurotransmitter diffuses across the synaptic gap, rather than being released by synaptic vesicles?
1.Dopamine
2.Gammaaminobutyric acid (GABA)
3.Nitrous oxide (NO)
4.Serotonin
3
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Mass-processed ground meat is a particularly common source of infection with EHEC
Indicate whether the statement is true or false.
In receptor-mediated endocytosis the proper sequence of event is:
a) primary lysosome exocytoses, digests food outside cell, food units absorbed by channels in plasma membrane. b) ligand-receptor binding, capping, fuse with endosome, secondary lysosome, digestion, absorption. c) capping, ligand-receptor binding, fuse with endosome, secondary lysosome, digestion, absorption. d) ligand-receptor binding, capping, secondary lysosome, digestion, absorption, tertiary lysosome. e) none of the above.
Which of the following approaches is likely most successful to prevent soil erosion?
(a) Farming using contour tillage (b) Fungal phytoremediation (c) Drip irrigation (d) Condensing the soil with heavy machinery
Most of the oligotrophic proteobacteria are found in the ________.
A. alpha proteobacteria B. delta proteobacteria C. beta proteobacteria D. gamma proteobacteria