An animal, such as an arthropod, that transmits a pathogen from one host to another is a ________.
A. vector
B. carrier
C. reservoir
D. fomite
E. source
Answer: A
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Which of the following might be missed if viable counts are done on food and/or water specimens?
A. Aerobic bacteria B. Viable but nonculturable cells C. Pathogenic bacteria D. Endospores
You are being asked to apply your knowledge about the properties of water.
What will be an ideal response?
For charged particles, transport across the cell membrane is influenced by the concentration gradient and ____
a. the size of the particle b. pore size c. electrical gradient d. ATP production
e. membrane thicknessWhen plasmids are used to produce a desired protein
A) the plasmids are inserted into the bacterial chromosome. B) the plasmids multiply and produce the protein outside of the bacterium. C) the desired gene is inserted into the plasmid, and the plasmid is returned to the bacterium by transformation. D) the bacterial genome and plasmid are inserted into the genome of the cell containing the desired gene (often the cell of a plant or animal).