Allergies occur when
A) too much complement is released into the blood.
B) antibodies malfunction and attack "self" cells.
C) mast cells release histamine in response to harmless substances.
D) foreign MHC proteins trigger an immune response.
C
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Create an experiment where you would use both a Southern blot and a Northern blot to determine if a newly isolated bacterium contains and actively uses the same catabolic pathway as previously demonstrated
What is the value in doing the Southern blot first? With results from these experiments, how would you conclude if the same pathway is active or not? What will be an ideal response?
Transfection is:
A. the artificial introduction of viral DNA into a bacterial cell. B. the artificial introduction of viral DNA into a eukaryotic cell. C. the first step (attachment) of a viral infection using a recombinant virus. D. facilitated by treatment of cells with calcium chloride and heat shock. E. useful when recombinant DNA is not introduced via infection by a viral vector.
Ecdysone inhibitors could be used as insecticides
Indicate whether the statement is true or false.
Cells take in and get rid of substances in various ways. Which process requires the expenditure of energy?
A) passive transport B) diffusion C) active transport D) osmosis