A high therapeutic index is
A. more toxic to the patient.
B. less toxic to the patient.
C. has no effect on the patient.
D. has no effect on the pathogen
B
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The lowest concentration of an antibiotic that prevents growth is the
A. 50% inhibitory dose. B. minimal inhibitory concentration (MIC). C. minimal lethal concentration (MLC). D. All of the choices are correct.
In the first step of glycolysis, glucose can be phosphorylated because
A) a phosphoanhydride bond has higher energy of hydrolysis than a phosphoester bond. B) the transfer of a phosphate from ATP to glucose is exergonic. C) both the number 2 and 3 carbons can be spontaneously phosphorylated. D) the ketosugar is rapidly phosphorylated at the carbon 1 hydroxyl group. E) both choices A and B
The evolution of which class of molecules played an important role in the development of multicellular organisms?
a. G proteins b. protein kinases c. second messengers d. ligand-gated ion channels e. steroid hormones
Ocean currents flow in response to ____; their
direction is an outcome of the earth's rotation and ____, causing a ____ rotation in the Northern Hemisphere and a ____ rotation in the Southern Hemisphere. a. gravity; topography; counterclockwise; clockwise b. topography; gravity; clockwise; counterclockwise c. temperature; topography; clockwise; counterclockwise d. gravity; topography; clockwise; counterclockwise e. winds; gravity; clockwise; counterclockwise