Answer Options:
True
False
Answer: True
Question: A phage is a virus that infects:
Answer Options:
Bacteria
Archaea
Protists
Answer: Bacteria
Question: Plant-like protist are termed [blank], while animal-like protist are termed [blank].
Answer: protohyta
protozoa
Question: Coliforms are Gram-negative lactose-fermenting rods.
Answer Options:
True
False
Answer: True
Question: The Lac operon is an example of an [blank] operon in which the presence of lactose allows for the transcription of the beta-galactosidase gene.
Answer: inducible
Question: Which of the following portals of entry for infection is more likely to require the highest infectious dose?
Answer Options:
A. Respiratory tract
B. Urogenital tract
C. Skin
D. GI tract
Answer: Skin
Question: A disease reservoir and a disease source are more likely to be different when:
Answer Options:
The pathogen can’t survive well outside the host.
The pathogen can survive well outside the host.
The pathogen is a fungus.
Answer: The pathogen can’t survive well outside the host.
Question: Following are data collected from a serial dilution experiment using E. coli in which you plated 100 microliters (0.1 mL) onto each of the following plates. What is the concentration of cells in the original stock solution?
Answer Options:
1.56 x 10^3 CFU/mL
1.56 x 10^7 CFU/mL
1.56 x 10^8 CFU/mL
1.56 x 10^9 CFU/mL
Answer: 1.56 x 10^9 CFU/mL
Question: Entamoeba coli causes the disease amoebic dysentery.
Answer Options:
True
False
Answer: False
Question: True or False: The human microbiome is considered a commensal relationship.
Answer Options:
True
False
Answer: True