Answer Options:
Commensal
Mutualistic
Amensal
Predatory
Answer: Mutualistic
Question: Microscope lenses can routinely be cleaned with paper towels.
Answer Options:
True
False
Answer: False
Question: There is no cell that lacks this structure:
Answer Options:
Cytoplasmic membrane
Nucleus
Mitochondrion
Golgi
Peptidoglycan
Answer: Cytoplasmic membrane
Question: The population of Montana is 1.07 million people. Since surveillance began in 1993, there have been 42 reported cases of hantavirus in New Mexico. What is the prevalence of hantavirus in the population of that state?
Answer Options:
0.04%
0.00004%
4%
0.4%
Answer: 0.004%
Question: If you flood starch agar plates with Gram’s iodine the agar will turn purple. If the starch has been broken down, a ______ will appear around the colony.
Answer Options:
Clear zone
Zone of inhibition
Yellow halo
Metallic sheen
Answer: Clear zone
Question: You inoculated a Colilert™ tube with an unknown bacterium. After incubation, you notice that the Colilert™ medium has turned from colorless to yellow. Which of the following enzymes are responsible for this color change?
Answer Options:
Glucuronidase
β-galactosidase
Amylase
Catalase
Answer: β-galactosidase
Question: All strains of E. coli are pathogenic.
Answer Options:
True
False
Answer: False
Question: If you perform a Gram stain on a pure culture of bacteria and you observe pink, sausage-shaped cells at 1000X magnification. How would you characterize this particular bacteria?
Answer Options:
Gram negative spirals
Gram positive rods
Gram positive cocci
Gram negative cocci
Gram negative rods
Answer: Gram negative rods
Question: Posterior pituitary does not produce any hormone, rather stores hormones produced by the hypothalamus.
Answer Options:
True
False
Answer: True
Question: An outbreak is larger scale/size than an epidemic.
Answer Options:
True
False
Answer: False
Question: What organism are viruses not capable of infecting?
Answer: Other viruses
Question: Which of the following methods of transport into a cell requires an input of energy?
Answer Options:
simple diffusion
facilitated diffusion
active transport
Answer: active transport
Question: Which quadrant in a Quadrant Streak is the least concentrated and contains isolated colonies?
Answer Options:
Quadrant 1
Quadrant 2
Quadrant 4
Quadrant 3
Answer: Quadrant 4
Question: Euglena is capable of both photosynthesis and heterotrophy, and therefore classified as a mixotroph.
Answer Options:
True
False
Answer: True
Question: The correct units when calculating original cell density (OCD) are:
Answer Options:
nm
CFU/mL
cells/mL
OCD/mL
Answer: CFU/mL
Question: ____________ is an intermediate molecule in glycolysis.
Answer Options:
Pyruvate
Glyceraldehyde-3-phosphate (G-3-P)
Acetyl-CoA
Glucose
Answer: Glyceraldehyde-3-phosphate (G-3-P)
Question: Which of the following is an example of a retrovirus?
Answer Options:
A. Influenza
B. HIV
C. Cytomegalovirus
D. Varicella zoster
Answer: B. HIV
Question: Carbohydrate fermentation is the metabolic process by which an organic molecule acts as an electron donor and one or more of its organic products act as the final electron acceptor.
Answer Options:
True
False
Answer: True
Question: Pregnancy is associated with what change in the composition of the human gut microbiome?
Answer Options:
Increase in the population of methanogens
Reduction in the population size of Proteobacteria and Actinobacteria
Increase in the number of Firmicutes
Increase in the population size of Proteobacteria and Actinobacteria
Answer: Increase in the number of Firmicutes
Question: Wernicke encephalopathy/thiamine (Vit B1) deficiency is a side effect of which substance use?
Answer Options:
Meth
Cocaine
Alcohol
Marijuana
Answer: Alcohol
Question: All microbes associated with food are harmful and should be eliminated.
Answer Options:
True
False
Answer: False
Question: The standard ‘9+2’ flagellum structure is common in __________ organisms.
Answer Options:
Eukaryotic
Prokaryotic
Both
Neither
Answer: Eukaryotic