What is the process by which most unicellular eukaryotic organisms expel wastes?
a. phagocytosis
b. endocytosis
c. exocytosis
d. contractocytosis
c. exocytosis
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You treat an organism with a drug that inhibits calcium permeability in nerve cells specifically. As a result, you expect to see
A) no depolarization of membranes. B) no repolarization of membranes. C) failure to achieve the threshold necessary to stimulate a signal. D) presynaptic neurotransmitter release. E) no postsynaptic receptors.
Knockin mice can be created using the Cre/loxP system. In this procedure, the loxP sites are used to
A) delete the neomycin-resistance marker gene. B) recombine the mutation into the genome. C) express Cre protein. D) flip the orientation of genomic DNA after the mutation is inserted.
Water-soluble vitamins are _____
a. stored in body fat b. not destroyed by heat c. often coenzymes d. often lacking in the diet e. stable in heat
RNA interference (RNAi) was first discovered in prokaryotes and is thought to have evolved as protection against certain types of viruses.
Answer the following statement true (T) or false (F)