During an auditory transduction, ion flow varies across the _____
A) tectorial membrane
B) round-window membrane
C) hair cell membrane
D) basilar membrane
C
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The formation of amino acids under abiotic
conditions was important because they serve as a. a supply of structural units for proteins. b. enzymes to catalyze reactions. c. subunits in the formation of DNA. d. subunits in the formation of RNA. e. subunits for the formation of lipids.
Most chytrids eat
a. organic waste. b. are photosynthetic. c. strictly corn. d. muscle tissue. e. none of these.
Two microbiology students performed the viable plate count exercise, as described in this lab manual. Both students performed the procedure using the same sample of pasteurized milk, however their final coliform and total bacterial colony counts varied greatly. Which of the following scenarios could have caused this variation?
A) Improper dilutions B) Not mixing the milk before dilutions C) Nonsterile water used for dilutions D) Spreading the inoculum with a sterile spreader that had not cooled E) Immediately inverting the inoculated plates F) All of the above
The lateral movement of transmembrane proteins can be restricted by several different mechanisms. Which mechanism best describes the process by which focal adhesions are formed to promote cell motility?
(a) proteins are tethered to the cell cortex (b) proteins are tethered to the extracellular matrix (c) proteins are tethered to the proteins on the surface of another cell (d) protein movement is limited by the presence of a diffusion barrier