Nonfastidious (rapidly growing), aerobic bacterial organisms can be saved up to 1 year on __________ slants
a. Mycosel agar
b. MacConkey agar
c. Löwenstein-Jensen medium
d. trypticase soy agar (TSA)
D
Nonfastidious (rapidly growing), aerobic bacterial organisms can be saved up to 1 year on TSA slants. Long-term storage (less than 1 year) of aerobes or anaerobes can be accomplished either by lyophilization (freeze drying) or freezing at ?70°C.
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An antimicrobial's therapeutic index is
A) The drug level required for clinical treatment of an infection B) The drug level at which the agent becomes too toxic for the host C) The ratio of the toxic dose to the therapeutic dose D) The level of effectiveness in a population
Heavy metals in contaminated soils can be taken up by hyperaccumulating plants. Lead and cadmium taken up this way are often accumulated in the plants'
A. sclerenchyma. B. root nodules. C. trichomes. D. stomates. E. rhizomes.
Which molecule would you predict moves through a lipid bilayer most rapidly without the help of a transport protein?
A. C2H5OH B. C4H10 C. CH3OH D. NH2SO2CH3 E. C6H12O6
You are examining a laboratory subject in which blood calcium levels are rising. Predict the consequences for this individual.
A. Blood vitamin D (1,25 dihydroxyvitamin D) would be stimulated. B. Blood parathyroid hormone levels would decrease. C. Blood parathyroid hormone levels would increase. D. Blood calcium levels are not under control by hormones. E. Vitamin D would be converted to vitamin E.