The most medically important bacteria sought in the medical laboratory are cultivated using incubators with temperatures maintained in what range?
a. 35°C to 37°C
b. 30°C to 35°C
c. 37°C to 39°C
d. 25°C to 35°C
A
Temperatures of 35°C to 37°C simulate those found in the body and best allow pathogens to grow.
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Which of the following intermediate filament proteins is incorrectly matched with the tissue in which it is found?
A) cytokeratins-epithelial B) desmin-smooth muscle C) vimentin-mesenchymal D) nestin-connective E) GFA protein-nervous
A breeder of cattle has a herd of white cows and a roan bull. Hair color in this breed is controlled by an incompletely
dominant gene. The two homozygous forms are either red or white, and the heterozygous is roan. (a) What colors of calves are expected and in what proportions? (b) Outline a procedure to develop an all-red herd. What will be an ideal response?
Many of the molecules that actively maintain the integrity of a cell's chromosomes, particularly during DNA replication and mitosis, are involved in crossing over during ____ of meiosis.
A. prophase II B. prophase I C. metaphase II D. metaphase I E. telophase II
When would a microbiologist want to use broth media?
A) when isolating colonies B) when performing the streak plate isolation technique C) when growing large batches of microbes D) when observing specific culture characteristics E) when testing for motility