Effects a virus can have on a host cell
What will be an ideal response?
formation of viral inclusions in host cells; lysing host cells; fusion of host cells (syncytia)
NOT production of endotoxins to kill host cells
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Explain how Mendel’s law of segregation applies to the distribution of alleles in gametes.
What will be an ideal response?
All of the following are appropriate strategies for overcoming drug resistance in bacteria except
A. decreasing the use of antibiotics in agriculture. B. prudent use of antibiotics when treating viral infections. C. heightened infection control in health care facilities. D. patient compliance with dosage instructions when taking antibiotics.
Luria and Delbruck grew many liquid cultures of bacteria then spread a small sample of each culture on nutrient agar infused with bacteriophage in separate petri plates. They assayed the number of bacterial colonies that formed on each plate. What did the appearance of a bacterial colony on a petri plate indicate?
A) The bacterial colony was derived from one initial cell that was resistant to infection by the bacteriophage. B) The bacterial colony was made up of many cells that became resistant to bacteriophage infection independently. C) A colony formed when a bacterial cell was not resistant to bacteriophage infection. D) The bacterial cells that made up a colony were resistant to antibiotic.
The biological oxygen demand is a metric to indicate the capacity of
a. autotrophs in the water. b. microbes to oxidize organic compounds. c. primary producers. d. all of the above.