Not including organisms in the Enterobacteriaceae family, the most common gram-negative bacilli encountered in clinical specimens are:
a. Pseudomonas.
b. Burkholderia.
c. Ralstonia.
d. Vibrio.
A
In the clinical setting, Pseudomonas aeruginosa is the most commonly encountered gram-negative species that is not a member of the Enterobacteriaceae family. This organism survives in various environments in nature, as well as in homes and hospitals (see Table 21-1). Because of the ubiquitous nature of P. aeruginosa, transmission of this organism to humans can occur in a variety of ways.
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In aerobic respiration, chemiosmotic generation of ATP is driven by:
A. Pi transfer through the plasma membrane. B. the Na+/K+ pump. C. a difference in H+ concentration on the two sides of the inner mitochondrial membrane. D. osmosis of macromolecules. E. large quantities of ADP.
The only way to meet the resource needs of future generations is through ____
a. sustainable resource use b. biological magnification c. creating conservation hotspots d. clear cutting and mining
e. increasing use of nonrenewable resourcesCarotenoids are important to many plants because these pigments are able to
A. store electrons for use during the "dark" reaction of photosynthesis. B. absorb water so that hydrolysis can be carried out in the chloroplasts. C. absorb wavelengths of light that neither chlorophyll a nor b can absorb. D. capture UV radiation that is harmful to the DNA in the nucleus of plant cells. E. remove carbon dioxide from the air.
Two organisms with the same genotype always have the same phenotype
a. true b. false