In a signal transduction pathway involving cAMP as a second messenger, after a G protein is activated, the activated
G protein then activates:a.
phospholipase C.
b. adenylyl cyclase.
c. calmodulin.
d. protein kinase.
e. diacylglycerol.
b
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What does inhibin inhibit?
a. estrogen production b. LH production c. FSH production d. testosterone production
E. coli strains toxic to humans live in the
intestine of ____ without sickening them. I. birds and frogs II. goats and sheep III. cattle and deer
a. I only b. I and II c. II and III d. I and III e. all of these
Why do lymph nodes swell during an
infection?
a. Macrophages accumulate in them. b. Bacteria accumulate in them. c. T cells accumulate in them. d. Production of lymphatic fluid increases. e. Production of mucous increases
An atom that is negatively charged because it has accepted an electron is a(n):
A. isotope. B. monomer. C. isomer. D. ion.