The G protein that activates adenylyl cyclase is a
a. monomeric G protein in the Ras family that binds GTP.
b. dimeric G protein that separates into ? and ? subunits.
c. heterotrimeric G protein that separates into ? and ?? subunits.
d. heterotrimeric G protein that separates into ?? and? subunits.
Answer: c. heterotrimeric G protein that separates into ? and ?? subunits.
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The ________ activity of RNA polymerase is sufficient for the process of RNA proofreading.
Fill in the blank(s) with the appropriate word(s).
NADH transfers electrons to oxygen through which process?
a. glycolysis b. acetyl CoA formation c. the Krebs cycle d. electron transfer phosphorylation e. substrate-level phosphorylation
The portion of the flower containing pollen grains is
a. the pollen sac. b. the microsporangium. c. the anther. d. all of the above.
The mumps virus infects ________ cells.
A. brain B. liver C. lung D. salivary gland E. small intestine