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- 1. Multiple Choice
Which of the following statements about archaea is FALSE?
They are prokaryotes.
They lack peptidoglycan in their cell walls.
Some are thermoacidophiles; others are extreme halophiles.
They evolved before bacteria.
Some produce methane from carbon dioxide and hydrogen.
- 2. Multiple Choice
Which of the following characterizes the Domain Bacteria?
prokaryotic cells; ether linkages in phospholipids
eukaryotic cells; ester linkages in phospholipids
prokaryotic cells; ester linkages in phospholipids
complex cellular structuresE) multicellular
- 3. Multiple Choice
If two organisms have similar rRNA sequences, you can conclude that they
live in the same place.
evolved from a common ancestor.
will have different G-C ratios.
will both ferment lactose.
mated with each other.
- 4. Multiple Choice
All of the following statements are reasons why fluorescent in situ hybridization (FISH) has become a valuable tool for environmental microbiologists EXCEPT
it allows for detection of uncultured microbes.
it demonstrates the diversity of microbes in an environment.
it allows observation of microbes in their natural environment in association with other microbes.
it allows one to obtain pure cultures of microbes.
- 5. Multiple Choice
Which of the following criteria is most useful in determining whether two organisms are related?
Both ferment lactose.
Both are gram-positive.
Both are motile.
Both are aerobic.
Each answer is equally important.
- 6. Multiple Choice
Clone
genetically identical cells derived from a single cell.
a genetically engineered cell.
a taxon composed of species.
a mound of cells on an agar medium.
None of the answers is correct.
- 7. Multiple Choice
Into which group would you place a photosynthetic organism that lacks a nucleus and has a thin peptidoglycan wall surrounded by an outer membrane?
Animalia
Fungi
Plantae
Firmicutes (gram-positive bacteria)
Proteobacteria (gram-negative bacteria)
- 8. Multiple Choice
Facultatively anaerobic gram-negative rods are found in
Dogs
Humans
Plants
Cats
- 9. Multiple Choice
Requirements for X and V factors are used to identify
Staphylococcus.
Escherichia.
Neisseria.
Haemophilus.
Pseudomonas.
- 10. Open Ended
Identify each of the following as either gram-negative or gram-positive.
A) Bacillus:
B) Escherichia:
C) Lactobacillus:
D) Staphylococcus:
E) Streptococcus:
1) Gram-positive
2) Gram-negative
- 11. Multiple Choice
BONUS: Covid-19, also known as Sars-Cov 2 is a virus infecting the host cells of the upper respiratory system. Knowing that the disease is caused by a virus, is the virus Gram-negative or Gram-positive? Notice that Gram-negative bacteria have a double membrane that cannot be penetrated by many antibiotics while Gram-positive bacteria bacteria retain a purple-colored stain
Gram-positive
Gram-negative
Both
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