G protein-adenyl cyclase activity has been shown, in some cases, to be associated with certain diseases. In the case of cholera, which of the following is not correct?
A) Vibrio cholera bacteria colonize the gut.
B) Cholera toxin is secreted by Vibrio cholera bacteria.
C) The cholera toxin causes the cells of the gut to take in salts and fluids.
D) Cholera toxin alters Gs so that it no longer hydrolyzes GTP.
E) The toxin, by altering Gs, keeps intracellular cAMP levels high and doesn't allow them to decrease.
C) The cholera toxin causes the cells of the gut to take in salts and fluids.
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a. malaria b. leukemia c. infectious mononucleosis d. anemia e. toxemia
A researcher has used in vitro mutagenesis to mutate a cloned gene and then has reinserted the mutated gene into a cell. To have the mutated sequence disable the function of the gene, what must then occur?
A) recombination resulting in replacement of the wild type with the mutated gene B) use of a microarray to verify continued expression of the original gene C) replication of the cloned gene using a bacterial plasmid D) transcription of the cloned gene using a BAC
Salmonelloses are:
What will be an ideal response?
There are some similarities between prokaryotic and eukaryotic cells. Which of the following structures is found in both prokaryotic and eukaryotic cells?
A. lysosome B. mitochondrion C. nucleus D. ribosome