Which site on an enzyme is where substrates bind?
A) the activation site
B) the active site
C) the catalyst site
D) the lock and key site
Ans: B) the active site
You might also like to view...
Which observation suggested to Sutherland the involvement of a second messenger in epinephrine's effect on liver cells?
A) Enzymatic activity was proportional to the amount of calcium added to a cell-free extract. B) Receptor studies indicated that epinephrine was a ligand. C) Glycogen breakdown was observed only when epinephrine was administered to intact cells. D) Glycogen breakdown was observed when epinephrine and glycogen phosphorylase were combined. E) Epinephrine was known to have different effects on different types of cells.
Which of the following best describes the autoimmune response?
a. An antibody activating the humoral immune response in response to a foreign body b. The T H 1 cytokine-mediated inflammatory response to an antigen c. An antibody marking parts of one’s own body as foreign d. An antibody-mediated immune response that happens within minutes of exposure to a usually harmless antigen
The few ancestors of the Galapagos finches who colonized the islands is an example of
A. a bottleneck. B. natural selection. C. increased mutation rate. D. artificial selection. E. founder effect.
An escalation of attack and defense traits is the only possible outcome of an evolutionary arms race.
a. true b. false