Erythropoietin stimulates the manufacture of
A) albumin. B) platelets. C) red blood cells. D) white blood cells.
C
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Of the following molecules, which would not be expected to be moved across a membrane by simple diffusion?
A) oxygen B) fatty acids C) water D) glucose E) dimethylurea
I've cloned a genomic library and know that my bacteria have foreign DNA fragments inserted into the
cloning vector. I now need to identify the specific bacteria that have the gene coding for protein X. How can I locate these bacteria?
a. DNA hybridization of the different colonies b. PCR of the same bacterial mixture that was spread on agarose plates c. restriction endonuclease treatment of DNA from some of the bacterial colonies d. agarose gel electrophoresis of DNA isolated from the bacterial colonies e. transfer the bacterial colonies to filter paper
What antibody class is the most common class of antibody produced in the primary response to an antigen?
A) IgM B) IgE C) IgG D) IgD E) IgA
During neuronal signaling, a change in membrane potential will cause sodium channels to open and let Na+ ions diffuse down their concentration gradient into the cell. Which of the following helps establish the concentration gradient necessary for this process to occur?
A. Na+/K+ channel B. Na+/K+ pump C. Na+ symporter D. voltage-gated Na+ channel