Answer Options:
True
False
Answer: False
Question: Trypanosome cruzi is an example of an organism that causes:
Answer Options:
The flu.
Cyanobacterial harmful algal blooms.
Diarrheal disease
Chagas’ Disease
Answer: Chagas’ Disease
Question: True or False: Stop codons also encode an amino acid.
Answer Options:
True
False
Answer: False
Question: In a Colilert technique, the presence of this bacterial enzyme is visualized as blue fluorescence under UV light and indicative of E. coli contamination.
Answer Options:
Catalase
Galactosidase
Glucuronidase
Oxidase
Answer: Galactosidase
Question: During which phase of the bacterial growth curve is it most accurate to calculate generation time for a bacterial culture?
Answer Options:
Lag Phase
Exponential Phase
Stationary Phase
Death Phase
Answer: Exponential Phase
Question: Alpha helices and beta sheets are examples of:
Answer Options:
Protein primary structures
Protein secondary structures
Protein tertiary structures
Protein quaternary structures
Answer: Protein secondary structures
Question: Which family of viruses are least due to an extrachromosomal element that is located in the host’s nucleus?
Answer Options:
A. Poxviruses
B. Retroviruses
C. Herpesviruses
D. Hepadnaviruses
Answer: A. Poxviruses
Question: During the course of an infection, your patient displays vague feelings of unease and nonspecific complaints. Which stage of infection and disease is she undergoing?
Answer Options:
Incubation
Invasion
Convalescent
Prodromal
Answer: Prodromal
Question: True or False: Red blood cells are smaller than bacterial cells.
Answer Options:
True
False
Answer: False
Question: True or False: All other things being equal, a larger numerical aperture on a lens would result in better resolution (i.e., smaller limit of resolution).
Answer Options:
True
False
Answer: True
Question: You’re most likely to find a __________ carrier of a disease in a hospital or other healthcare setting.
Answer Options:
Passive
Asymptomatic
Nosocomial
Answer: Asymptomatic
Question: Of the following areas, which is the most diverse in terms of the species making up the microbiome in that area?
Answer Options:
Stomach
Large Intestine
Mouth
Skin
Answer: Large Intestine
Question: Atherosclerosis/arteriosclerosis can be a cause of vascular dementias True False
Answer: True
Question: If you are using a microscope that has a limit of resolution of 250 nm, then two points which are 210 nm apart will
Answer Options:
Be seen as two points
Be seen as one point
Blur into one
Answer: Blur into one
Question: Which type of microscope can be used to observe viruses?
Answer Options:
Phase Contrast
Bright Field
Scanning Electron Microscope
Both Phase Contrast & Bright Field
Both Bright Field & Scanning Electron
Answer: Scanning Electron Microscope
Question: What is the dilution factor, if you are conducting a serial dilution and you add 1 ml of culture to 99 mL PBS?
Answer Options:
10^-1
10^-2
1:10
0.1
10^-3
Answer: 10^-2
Question: Mannitol salt agar (MSA) is an example of a medium that is:
Answer Options:
Selective
Differential
Both
Answer: Both
Question: What is a substance produced largely by certain bacteria or fungi that can inhibit or stop the growth of other microorganisms?
Answer: antibiotic
Question: Mannitol salt agar (MSA) selects for organisms that can tolerate high ______ and differentiates organisms that can ferment _______.
Answer Options:
salt; mannitol
pH; mannitol
osmotic; lactose
carbon dioxide; glucose
Answer: salt; mannitol
Question: Amylase is a constitutive enzyme for Bacillus. True False
Answer: True
Question: A contaminated culture contains two or more known bacterial species.
Answer Options:
True
False
Answer: True
Question: Which of the following describes the appearance of a Colilert tube that has been inoculated with E. coli?
Answer Options:
clear liquid that fluoresces blue under UV light
clear liquid that does not fluoresce under UV light
yellow liquid that does not fluoresce under UV light
yellow liquid that fluoresces blue under UV light
Answer: yellow liquid that fluoresces blue under UV light