Which one of the following statements about G-protein coupled receptor-mediated stimulation of adenylate cyclase is notcorrect?
A. Adenylate cyclase is stimulated by GTP-bound G-protein.
B. The cAMP generated by adenylate cyclase binds directly to a transcriptional activator.
C. The cAMP generated by adenylate cyclase is a second messenger.
D. The stimulation of adenylate cyclase is transduced through protein phosphorylation.
B
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How does the cell overcome inhibition from irreversible inhibitors?
a. by binding a second inhibitor, which forces the enzyme's conformation to dislodge the first inhibitor b. by phosphorylating the enzyme, altering the enzyme's conformation to dislodge the inhibitor c. by altering the cellular pH, which will decrease the bonding between the enzyme and the inhibitor d. by degrading the enzyme-inhibitor complex and generating new enzyme e. by upregulating the expression of other enzymes with similar catalytic functions
The above figure represents
a. normal apoptosis. b. two digits that did not separate due to low apoptosis. c. elongated digital cell development. d. a special effect from an alien movie. e. none of these.
Glycolysis reactions involve ____
a. aerobic metabolism b. phosphorylation reactions c. mitochondria d. Krebs cycle reactions
e. electron transport chain reactionsA disease cause by a virus is _______.
A. flu B. botulism C. tuberculosis D. two of the above