Biosynthesis and pathogenesis
What will be an ideal response?
--Legionella pneumophila
--seen in lungs
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The definition of an indigenous people is a group that
A) is the oldest in its geographical area and has retained its culture. B) has a genetic disease that is rare in other groups. C) has most recently come into a geographical area. D) has been the target of discrimination.
Which of the following contributes most to gene flow?
a. adaptation b. mutation c. migration d. environmental variance
At puberty, an adolescent female body changes in both structure and function of several organ systems, primarily under the influence of changing concentrations of estrogens and other steroid hormones. How can one hormone, such as estrogen, mediate so many effects?
A) Estrogen is produced in very large concentration and therefore diffuses widely. B) Estrogen has specific receptors inside several cell types, but each cell responds in the same way to its binding. C) Estrogen is kept away from the surface of any cells not able to bind it at the surface. D) Estrogen binds to specific receptors inside many kinds of cells, each of which have different responses to its binding. E) The subcomponents of estrogen, when metabolized, can influence cell response.
Consider a gram-negative human pathogen isolated from marine mammals. This pathogen is subjected to a series of tests and found to have the following characteristics: oxidase-positive; does not hydrolyze urea; produces indole; does not produce acetoin. Which of the following could it be?
a. Pasteurella multocida b. Mannheimia haemolytica c. Klebsiella pneumoniae d. Yersinia enterocolitica