During an action potential, the membrane potential can reach as high as ____
a. -10 mV
b. 0 mV
c. +10 mV
d. +20 mV
e. +30 mV
ANSWER: e
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The internal body fluids of an osmoconformer can best be described as having:
A. roughly the same total solute concentration as the external environment. B. a higher solute concentration than the external environment. C. a lower solute concentration than the external environment. D. all of the same concentrations of particular ions as the external environment. E. None of the answer options is correct.
Provide support for using the product rule in generating a high confidence that an individual has a unique DNA profile using multiple STRs
What will be an ideal response?
The kidneys are important homeostatic organs, contributing to maintenance of all of the following EXCEPT
A. blood pH. B. blood volume. C. blood pressure. D. destruction of worn-out red blood cells. E. ion concentration of extracellular fluids.
A researcher inserted DNA fragments from an organism into expression vector plasmids and introduced the modified plasmids into bacterial cells. Which of the following methods would be an effective means of identifying which clones contain a specific gene
of interest? A) Sequence the DNA of the plasmids from each isolate. B) Prepare and analyze restriction fragments of the plasmids. C) Isolate clones that still have the vector's genetic marker. D) Assay for activity of the gene product. E) Use reverse transcriptase to prepare cDNA copies.