Viruses that infect bacteria are:
a. Not known to exist
b. Prions
c. Bacteriophages
d. Composed of protein only
e. Also capable of causing disease in humans
c. Bacteriophages
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Which of the following statements is true concerning dark-field microscopy?
a. This type of microscopy uses specific stains to enhance the contrast of certain bacteria. b. The condenser does not allow light to pass directly through the specimen but directs the light to hit the specimen at an oblique angle. c. Dark-field microscopy allows the visuali-zation of larger viruses. d. Dark-field microscopy can differentiate various difficult-to-grow organisms by using immunofluorescence.
Bone matrix is secreted by
a. osteoblasts. b. osteocytes. c. osteolytes. d. osteoclasts. e. osteopores.
How could a man with blood type A and a woman with blood type B produce a child with blood type O?
What will be an ideal response?
ELISA tests use a fluorescent dye as a label to trace antigen-antibody reactions.
a. true b. false