Medical Quiz

Microbial Growth & Nutrition Quiz


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

A. obligate aerobes

B. facultative anaerobes

C. obligate anaerobes

D. anaerobes

Which microbes use Carbon as a source of energy?

A. photoheterotrophs and photoautotrophs

B. chemoheterotrophs and chemoautotrophs

What is the effect of hypotonic solution to bacterial cell?

A. shrink

B. burst

C. nothing

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

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

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

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

A. organotrophs

B. chemoheterotroph

C. photoautotrophs

D. chemoautotrophs

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

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

A. Chemoautotrophs

B. Heterotrophs

C. Chemoheterotrophs

D. Photoautotrophs

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

A. photoautotrophs

B. chemoautotrophs

C. photoheterotrophs

D. chemoheterotrophs

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 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

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

A. Chemotrophs

B. Autotrophs

C. Heterotrophs

D. Saprophytes

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

A. photoautotrophs and chemoautotrophs

B. chemoheterotrophs and photoheterotrophs

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

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


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