Catalyzes the formation of cytosolic second-messenger molecules

a. Adenylate cyclase
b. G-protein
c. Carrier protein
d. cAMP
e. Ion channel receptor protein


Ans: a. Adenylate cyclase

Biology & Microbiology

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All protists have cell walls

A. true B. false

Biology & Microbiology

A drug researcher has developed a macromolecule that can bind to scrapie and thus change the prion's 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.

Biology & Microbiology

Malpighian tubules are the excretory organs found in

A. earthworms. B. flatworms. C. jellyfish. D. insects. E. vertebrates.

Biology & Microbiology

If you hear a friend call someone a "Neanderthal," why might it conceivably be a compliment?

A) Neanderthals cared for the old and sick. B) Neanderthals were more creative than modern people. C) Neanderthals had better tools than the modern species. D) Neanderthals were more lightly built than modern people and therefore physically more attractive.

Biology & Microbiology