If adenylyl cyclase were inhibited in animal cells
a. binding of epinephrine to beta receptors would have no affect on cyclic AMP levels.
b. binding of epinephrine to beta receptors would increase cyclic AMP levels.
c. an increase in mRNA for cyclic AMP would occur.
d. an increase in mRNA for more beta receptors would occur.
e. epinephrine would not be able to bind to beta receptors.
A
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Although penicillin inhibits peptidoglycan synthesis, bacterial cells will continue to grow normally in the presence of penicillin in a(n) ________ environment.
A. nonpolar B. isotonic C. hypotonic D. hypertonic
The genomes of closely related species are more similar than distantly related species because _____
a. the less time since the species diverged, the more lethal DNA mutations will accumulate b. the more time since the species diverged, the more neutral DNA mutations will accumulate c. the less time since the species diverged, the more neutral DNA mutations will accumulate d. the more time since the species converged, the fewer adaptive DNA mutations will accumulate e. all organisms will accumulate lethal DNA mutations at the same rate
A bony skeleton, an operculum, and a swim bladder would be found in which group?
a) reptiles b) sharks c) amphibians d) ray-finned fishes e) mammals
In order to minimize its direct investments in foreign countries, companies pursue a strategy of:
a. establishing a foreign subsidiary. b. entering into a joint venture with a foreign company. c. home-based production and exports. d. franchising.