How Well Do You Know About Microbiology? Quiz

20 Questions | By Dindiam | Last updated: Mar 22, 2022 | Total Attempts: 374

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How Well Do You Know About Microbiology? Quiz - Quiz

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.

Questions and Answers

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