Cholera is spread by contaminated food and water. The bacterium kills by changing the permeability of the cells of the large intestine. Which therapy would give the best chance of saving a person with cholera, given the information in this chapter?
A) chemotherapy
B) radiation
C) fluid replacement
D) surgery
C
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Mannitol salt agar (MSA) only allows the growth of halophiles (salt-loving microbes); nonhalophiles will not grow. Among the halophiles, mannitol fermenters will produce acid that turns the pH indicator yellow; mannitol nonfermenters leave the medium red. Onto MSA you inoculate a halophilic mannitol fermenter and a halophilic mannitol nonfermenter. In this case, the medium is acting as (a) ________ medium(s).
A. enrichment B. differential C. selective and differential D. selective
mRNA is made up of introns that have been spliced together
a. True b. False Indicate whether the statement is true or false
A person suffers a stroke. A blood clot reduced blood flow in the brain. The person is unable to say
words, but is able to read and understand text. Which of the following best explains this person's problem?
a. The cortex of the cerebellum was affected by the reduced blood flow. b. The interruption in blood flow affected the corpus callosum. c. The region of damage was responsible for integration of visual and auditory stimuli. d. The reduced blood flow damaged Wernicke's area of the temporal lobe. e. The reduced blood flow damaged Broca's area of the temporal lobe.
Given that an individual is a compound heterozygote at the CFTR locus, the gene that causes cystic fibrosis, what can be inferred?
A) If the individual has children, all the children will have cystic fibrosis. B) At least one of the individual's parents had cystic fibrosis. C) The individual is a carrier for cystic fibrosis, but does not have the disease. D) A drug that effectively treats one allele may not treat the other.