Medical Quiz

Microbial Growth & Nutrition Quiz


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Which group of organisms will use/ prefers oxygen if it is present, but can survive without it?

A. obligate aerobe

B. obligate anaerobe

C. facultative anaerobe

D. aerotolerant anaerobe


When a cell is placed in a hypertonic environment, water 

A. moves out of the cell.

B. moves into the cell.

C. does not move into or out of the cell.

D. is not affected by this.


Which microbes use organic compounds for energy (fats, proteins and carbs)?

A. photoautotrophs and chemoautotrophs

B. chemoheterotrophs and photoheterotrophs


Bacteria that obtain their carbon source from carbon dioxide (inorganic compounds) are called?

A. Chemotrophs

B. Autotrophs

C. Heterotrophs

D. Saprophytes


Microbial growth is

A. Increase in cell size, not number of cells

B. Increase in number of cells, not cell size

C. technique used to grow microorganisms or cells in lab

D. rate of cell death exceeds the rate of cell division


Which microbes use inorganic compounds for energy (sodium, magnesium, oxygen etc.)?

A. photoheterotrophs and chemoheterotrophs

B. photoautotrophs and chemoautotrophs


Which microbes use sunlight as a source of energy?

A. photoheterotrophs and photoautotrophs

B. chemoheterotrophs and chemoautotrophs


Microorganisms that take up carbon (a chemical) from their organic energy source (fats, carbs, proteins).

A. Chemoautotrophs

B. Heterotrophs

C. Chemoheterotrophs

D. Photoautotrophs


Bacteria that are able to get their carbon source from organic compounds (carbs, fats, proteins)are called?

A. Autotrophs

B. Heterotrophs

C. Chemotrophs

D. Saprophytes


growth occurs in high concentrations of oxygen (top of tube)

A. obligate aerobes

B. facultative anaerobes

C. obligate anaerobes

D. anaerobes


The chemical growth requirements essential for bacterial growth are …?

A. Water,carbon,Nitrogen & sulphur

B. Water

C. Water, carbon, oxygen, phosphorus, Nitrogen, sulfur and other trace elements

D. Environmental waste


Which term best describes a bacteria that can’t exist in the presence of oxygen?

A. Obligate aerobe

B. Facultative aerobe

C. Obligate anaerobe

D. Facultative anaerobe

E. Microaerophlile


Which microbes use Carbon as a source of energy?

A. photoheterotrophs and photoautotrophs

B. chemoheterotrophs and chemoautotrophs


Organism that manually obtain their C and energy from the chemicals, preferably organic compounds

A. organotrophs

B. chemoheterotroph

C. photoautotrophs

D. chemoautotrophs


What is the effect of hypotonic solution to bacterial cell?

A. shrink

B. burst

C. nothing


Microorganism that requires light energy and gains nutrients via catabolism of organic compounds (fats, carbs, proteins)

A. photoautotrophs

B. chemoautotrophs

C. photoheterotrophs

D. chemoheterotrophs


Microbes that grow better without oxygen, but grow slowly when in the presence of oxygen.

A. obligate anaerobe

B. obligate aerobe

C. aerotolerant anaerobes

D. facultative anaerobes




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