Which of the following processes is correctly matched with its typical result?
a. Peristalsis - heartburn
b. Mucus production - ulcers
c. Parietal cell production of the components of HCl - diarrhea
d. Chief cell secretion of pepsinogen - diarrhea
e. Chyme backflow - heartburn
Answer: e. Chyme backflow - heartburn
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What is the minimum number of clones that should be in this mouse genomic library to have a 95% chance that it contains the entire genome?
The mouse genome consists of 2,700 Mb. A genomic library is constructed using BAC vectors and overlapping fragments of the mouse genome. The average size of the mouse DNA inserts is 200 kb. A) 2,700 B) 13,500 C) 54,000 D) 135,000
Competitive inhibition of enzymes occurs
A. when a substance other than the substrate binds at the active site of an enzyme. B. when the product, or other substances, instead of the reactant, bind to the active site of the enzyme. C. when a substance binds to an enzyme at a site away from the active site. D. by blocking the production of an enzyme. E. when the product, instead of the reactant, of a reaction binds to the active site.
A sticky structure adapted to receive pollen is
a(an)
a. style. b. stigma. c. anther. d. filament. e. corolla.
Which of the following correctly describes the order of events that occur when you touch a very hot
surface? 1) action potential 2) stimulus 3) receptor potential 4) transduction into electrical energy a. 1 ? 3 ? 4 ? 2 b. 2 ? 1 ? 4 ? 3 c. 2 ? 4 ? 3 ? 1 d. 4 ? 1 ? 3 ? 2 e. 3 ? 1 ? 4 ? 2