A drug researcher has developed a macromolecule that can bind to scrapie and thus change the prions conformation. What effect might this have on the actions of scrapie?
A. The shape change could prevent the scrapie protein from converting normal proteins to scrapie proteins
B. The shape change could induce scrapie protease activity
C. The shape change could stop the transcription of scrapie RNA
D. The shape change could stop the replication of scrapie DNA
E. The shape change could block the translation of scrapie RNA
A. The shape change could prevent the scrapie protein from converting normal proteins to scrapie proteins
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Bacteria reproduce by:
a. meiosis. b. cell fusion. c. binary fission. d. cloning. e. auxospore formation.
The rungs of the DNA ladder are formed by base pairs
a. joined by covalent bonds. b. joined by hydrogen bonds. c. joined by ionic bonds. d. NOT joined to each other
High levels of which chemical in the sleep centers of the brain induce drowsiness and sleep?
a. norepinephrine b. serotonin c. adrenalin d. encephalin e. cyclic AMP
Hormone X activates the cAMP second messenger system in its target cells. The greatest response by a cell would come from _____
A) applying a molecule of hormone X to the extracellular fluid surrounding the cell B) injecting a molecule of hormone X into the cytoplasm of the cell C) applying a molecule of cAMP to the extracellular fluid surrounding the cell D) injecting a molecule of cAMP into the cytoplasm of the cell E) injecting a molecule of activated, cAMP-dependent protein kinase into the cytoplasm of the cell