How Well Do You Know About Microbiology? Quiz
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Some people know a lot about microorganisms, but sometimes cant tells facts when asked a question about the different species that exist. How well do you know about microbiology? The quiz below is designed to see if you have what it takes to be a super microbiologist. Do give it a shot and share it with others to know where you stand in comparison.
- 1.Most bacteria reproduce by
- A.
Sexual reproduction
- B.
Binary fission
- C.
Budding
- D.
Homologous recombination
- 2.Microbial growth
- A.
Refers to the increase in the size of a microbial cell
- B.
Refers to the increase in the frequency of cell division
- C.
In a single generation's time leads to double the cell size
- D.
In a single generation's time leads to double the number of microbes
- 3.Serial dilutions are used to
- A.
Slow down the growth of microbes
- B.
Speed up the growth of microbes
- C.
Obtain bacterial cultures at several different concentrations
- D.
Form bacterial colonies
- 4.Turbidity in a bacterial culture can be measured using a/n
- A.
Incubator
- B.
Colony county
- C.
Spectrophotometer
- D.
Chemostat
- 5.Acidophiles would be expected to grow best at a pH of
- A.
3
- B.
6
- C.
9
- D.
12
- 6.Most human pathogens are
- A.
Psychrophiles
- B.
Mesophiles
- C.
Thermophiles
- D.
Acidophiles
- 7.Which of the following types of organisms would be most likely to have evolved to live in the large intestine, where there is a complete lack of free oxygen?
- A.
Obligate aerobe
- B.
Obligate anaerobe
- C.
Facultative anaerobe
- D.
Aerotolerant anaerobe
- 8.Which type of cell will generally shift to aerobic metabolism when oxygen is available but will carry on fermentation otherwise?
- A.
Aerotolerant anaerobes
- B.
Facultative anaerobes
- C.
Obligate anaerobes
- D.
Obligate aerobes
- 9.When cells are placed in a hypertonic environment they will undergo
- A.
Lysis
- B.
No change in size
- C.
Swelling of the cell which is contained by the cell wall
- D.
Plasmolysis
- 10.Sporulation occurs in gram positive bacilli, an example of it is
- A.
Bacillus cereus
- B.
Staphylococcus aureus
- C.
Klebsiella pneumoniae
- D.
Citrobacter sp.
- 11.Endospores are
- A.
Metabolically active
- B.
Reproductive structures
- C.
Found mostly in Gram negative organisms
- D.
Protective structures
- 12.Sporulation usually occurs in response to
- A.
A decrease in the level of carbon or nitrogen
- B.
An increase in temperature
- C.
A decrease in the amount of water
- D.
An increase in ultraviolet radiation
- 13.A candle jar would be used for growing
- A.
Gram negative organisms
- B.
Fastidious organisms
- C.
Thermophiles
- D.
Anaerobes
- 14.Sporulation is the production of spore and occurs in gram+ organisms. Triggers are ph, temperature, concentration of enzyme
- A.
True
- B.
False
- 15.Bacterial growth in colonies on agar plates
- A.
Have all phases of growth occurring simultaneously somewhere in the colony
- B.
Most growth occurs at the center of the colony
- C.
Involves budding of small new colonies from the surface of an existing colony
- D.
Have lag phase cells in the center of the colony, surrounded by a ring of cells in exponential phase
- 16.An obligate psychrophile would produce a turbin culture at ___________degrees Celcius
- A.
10
- B.
30
- C.
45
- D.
60
- 17.When a bacterial cell divides into two new cells, the new cells are called
- A.
Daughter cells
- B.
Sister cells
- C.
Son cells
- D.
Father cells
- 18.The toxic effects of the byproducts of oxygen metabolism are mitigated by which of the following?
- A.
Catalase
- B.
Superoxide dismutase
- C.
Lactase
- D.
Two of the above
- 19.Where would you expect to find a barophile
- A.
At the bottom of a lake
- B.
In unpasteurized milk
- C.
In the large intestine
- D.
In sewage
- 20.A culture that contains only a single species of organism is known as a
- A.
Pure culture
- B.
Koch culture
- C.
Mixed culture
- D.
Contaminated culture
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