Question: Protozoa are eukaryotic, single-celled organisms.
Answer Choices:
True
False
Answer: True
Question: What is the primary stressor that causes coral bleaching?
Infection
Answer Choices:
Starvation
Temperature increase
Sedimentation
Answer: Temperature increase
Question: True or False: Stop codons also encode an amino acid.
Answer Choices:
True
False
Answer: False
Question: In a BSL-2 laboratory, sandals & open-toed shoes are permitted as appropriate footwear in the laboratory.
Answer Choices:
True
False
Answer: False
Question: All bacterial cells have:
Endospores
Flagella
Answer Choices:
Plasmids
A chromosome
Mitochondria
Answer: A chromosome
Question: Antibiotics are ineffective in the treatment of fungal infections.
Answer Choices:
True
False
Answer: True
Question: True or False: Secondary endosymbionts are required for host reproduction.
Answer Choices:
True
False
Answer: False
Question: A countable plate contains _____ to _____ colonies (numerical format).
Answer: 30 to 300
Question: A disease reservoir and a disease source are more likely to be different when:
Answer Choices:
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: Antibiotics are resistant to bacteria.
Answer Choices:
True
False
Answer: False
Question: Plant-like protist are termed [blank], while animal-like protist are termed [blank].
Answer: protohyta
protozoa
Question: Bacteria contain many genes, but not all of them are necessarily being expressed at any given time. Bacterial enzymes that are utilized in the basic energy pathways of the cell and are continually synthesized are termed:
Synthetic enzymes
Answer Choices:
Repressible enzymes
Inducible enzymes
Constitutive enzymes
Answer: Constitutive enzymes
Question: After growth of the E. coli culture, ONPG was added to each of the three different carbon source tubes in the induction experiment. A positive result indicated the presence of what enzyme?
Answer Choices:
Oxidase
β-galactosidase
Amylase
Glucuronidase
Answer: β-galactosidase
Question: A diel cycle:
Is a cycle that occurs over a 24 hour period
Answer Choices:
Is a cycle that occurs over a 24-hour period
Is how a Hawaiian bobtail squid produces its bioluminescent “glow”
Both a 24 hour cycle and how the bobtail squid obtains its symbiont
Answer: Both a 24 hour cycle and how the bobtail squid obtains its symbiont
Question: Which of the following is true about viruses in soil?
Answer Choices:
They are present in low abundance.
They can be easily recovered from soil organic matter.
They can contribute to carbon cycling and organic matter degradation through auxiliary metabolic genes.
They allow the cells to withstand harsh environmental conditions.
Answer: They can contribute to carbon cycling and organic matter degradation through auxiliary metabolic genes.
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 Choices:
Be seen as two points
Be seen as one point
Blur into one
Answer: Blur into one
Question: If you perform a Gram stain on a pure culture of bacteria and you observe purple, round-shaped cells at 400X magnification. How would you characterize this particular bacteria?
Answer Choices:
Gram negative rods
Gram positive rods
Gram negative cocci
Gram positive cocci
Answer: Gram positive cocci
Question: The term “ubiquitous” can be applied to every bacterial species.
Answer Choices:
True
False
Answer: False
Question: The spread plate technique involves the use of an______ for even distribution of broth culture on agar’s surface.
swab
inoculating loop
inoculating needle
Answer Choices:
cell spreader/hockey stick
none of the above
Answer: cell spreader/hockey stick
Question: You want to determine the cell density of a liquid bacterial culture so you perform a serial dilution. You inoculate three TSA plates with 100 µL aliquots from three consecutive dilution tubes. After incubation, you count the colonies on each plate and obtain the results listed below. Which plates should be chosen to calculate the original cell density (OCD)?
Plate A: 337 CFU
Plate B: 35 CFU
Plate C: 4 CFU
Answer Choices:
Plate A
Plate B
Plate C
None of the plates
Answer: Plate B and Plate C
Question: Penicillin is an antibiotic produced by:
Protozoa
Pigs
Answer Choices:
Viruses
Fungi
All the above
Answer: Fungi