Heat is used to drive the stain into cells in the ________ staining procedure(s)
A) endospore stain
B) acid-fast stain
C) capsule stain
D) Gram stain
E) both acid-fast and endospore stains
E
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How does DNA differ from RNA?
A. RNA uses only purines B. RNA uses a different five-carbon sugar C. RNA has a contains different sized phosphate groups D. RNA has multiple bases attached to the sugar
Which type of nutrient can pass across epithelial cells without any expenditure of ATP?
A. iron B. calcium C. protein D. fat E. magnesium
Photoheterotrophs are best described as organisms that obtain energy to make ATP
A) from organic compounds but use sunlight to produce carbon sources. B) and organic compounds from sunlight. C) from sunlight but cannot make organic compounds from CO2. D) from some forms of chemicals. E) from organic compounds.
Optimal conditions for most mycobacterial cultures are:
a. 25°C to 30°C in the dark in an atmosphere of 2% carbon dioxide (CO2) and high hu-midity. b. 35°C in the dark in an atmosphere of 5% to 10% CO2 and high humidity. c. 35°C in the dark in a microaerophilic at-mosphere of 10% CO2 and high humidity. d. 32°C in the dark in an atmosphere of de-creased CO2 and increased humidity.