Answer Options:
Binary fission
Growth curve
Generation time
Death phase
Answer: Generation time
Question: A broth culture has 2.32 x 10^7 CFU/mL. Approximately how many CFU would you expect to count if you plated 1.0 mL? Please provide WHOLE number, NO EXPONENTS.
Answer: 23200000
Question: You are a new member of the Micro Lab prep staff. In order to get the best media making assignments for the semester, Professor Waters sets up a simple test: You must calculate the number of cells that grow in a bacterial culture over the course of an 8 hour incubation period. Here’s what you know: The culture was started with 68 cells. The generation time of this organism is 30 minutes. The incubation period is 8 hours. What is the total number of cells in the culture at the end of the 8 hour incubation period?
Answer Options:
32,640 cells
4,462,944 cells
6,323,786,496 cells
16,320 cells
Answer: 6,323,786,496 cells
Question: ____________ is an example of a holobiont.
Answer Options:
The Iceberg Effect
The SARS CoV-2 pandemic
A coral reef
A systemic infection
Answer: A coral reef
Question: True or False: The human skin is considered a more hostile environment for microbes than the human mouth.
Answer Options:
True
False
Answer: False
Question: Which is not true for the endocrine system:
Answer Options:
Maintains homeostasis (internal balance) of the body.
Consists of glands with ducts.
Main function is regulatory.
Endocrine glands produce hormones.
Answer: Consists of glands with ducts.
Question: Which bacterial species is found on human skin as part of the normal flora?
Answer Options:
Escherichia coli
Enterococcus faecalis
Staphylococcus epidermidis
Bacillus subtilis
Answer: Staphylococcus epidermidis
Question: You have a 60X objective lens in place, and the numerical aperture of the objective lens is 0.75. The numerical aperture of the condenser lens is 1.25. What is the total magnification if the ocular lens is 10X, with the eyepieces spaced 3 cm apart?
Answer Options:
6X
60X
600X
6000X
Answer: 600X
Question: A nosocomial infection:
Answer Options:
is caused by multiple microorganisms
is acquired in a hospital
cannot be spread from person-to-person
is also zoonotic
Answer: is acquired in a hospital
Question: During which phase of the bacterial growth curve is the population growing slowly due to an “adjustment” to the new environment?
Answer Options:
Lag Phase
Exponential Phase
Answer: Lag Phase
Question: A positive string test results indicates a Gram negative bacterium.
Answer Options:
True
False
Answer: True
Question: Viruses in the ocean are:
Answer Options:
A. The most numerically abundant biological entities.
B. The second most abundant predators.
C. The second largest biomass.
D. All of the above.
E. Both A & C.
Answer: D. All of the above
Question: Endogenous infections arise from microbes that are:
Answer Options:
In the patient’s own microbiome
In the hospital environment
In the community
Transmitted from one person to another
Answer: In the patient’s own microbiome
Question: True or false: Bacteria have NEVER been found associated with the human placenta.
Answer Options:
True
False
Answer: False
Question: The only hepatitis virus with a DNA genome is:
Answer Options:
Hepatitis A (HAV)
Hepatitis B (HBV)
Hepatitis C (HCV)
Hepatitis E (HEV)
Answer: Hepatitis B (HBV)
Question: Which of the following organisms is NOT likely to be found on the skin?
Answer Options:
Staphylococcus aureus
Micrococcus luteus
Propionibacterium granulosum
Staphylococcus epidermidis
Pseudomonas aeruginosa
Answer: Pseudomonas aeruginosa
Question: A turbid broth culture indicates bacterial growth.
Answer Options:
True
False
Answer: True
Question: Halobacterium salinarum is an organism that can live in extremely high concentrations of salt. This organism is an example of a/an:
Answer Options:
extremophile
psychrophile
halophile
Both extremophile and psychrophile
Both extremophile and halophile
Answer: Both extremophile and halophile
Question: Which one is not part of the endocrine system?
Answer Options:
Thyroid gland
Islets of Langerhans in pancreas
Pituitary gland
Salivary gland
Answer: Salivary gland
Question: Which one is the most frequently occurring psychiatric condition?
Answer Options:
Depressive disorder
Anxiety disorder
Paranoia
Mania
Answer: Anxiety disorder
Question: True or False: “Halophilic” bacteria always live in very hot environments.
Answer Options:
True
False
Answer: False
Question: A coverslip is required to view a Gram stained slide
Answer Options:
True
False
Answer: False
Question: Which of the following viruses have been eradicated from human populations thanks to vaccination?
Answer Options:
Measles
HIV
HPV
Smallpox
Answer: Smallpox
Question: Who created the smallpox vaccine using what related virus?
Answer Options:
Edward Jenner/monkeypox
Joseph Lister/monkeypox
Edward Jenner/cowpox
Answer: Edward Jenner/cowpox
Question: What type of agar is used to perform the Kirby-Bauer test?
Answer Options:
TSA
Glucose Mineral Salts Agar
Mueller-Hinton Agar
MFC Agar
Answer: Mueller-Hinton Agar