Mid-Term (Quiz) Flashcards
Chapter 6 (21 cards)
Which of the following will cause plasmolysis?
High salt environment
A(n) ______ is accumulation of many cells that are visible with the unaided eye.
colony
The initial introduction of microbes into a culture medium is referred to as a(n) ______ ,
Inoculum
while the resulting growth of microbes that result from this introduction are referred to as a(n) ______.
Culture
Microbial growth refers to an increase in cell size.
False
Agar is a polysaccharide primarily used in culture media as a nutrient source that is easily metabolized by microbes.
False
Microbe populations typically grow using simple asexual reproduction known as ______ .
binary fission
The ______ is a method used in microbiology to isolate pure colonies of microbes.
streak plate
List the 3 physical growth requirements for all microorganisms.
- Temperature
- pH
- Osmotic Pressure
Which phase of the microbial growth curve involves a period of intense growth?
Log phase
Phosphorus is a major component of all proteins.
False
Solidified media on shallow dish
Agar plate
Used to grow desired microbes / Suppress unwanted microbes
Selective media
Liquid media in test tube
Nutrient broth
Solidified media in test tube
Slant
Used to detect desired microbes
Differential media
Mannitol salt agar is considered both a selective media and a differential media.
True
Facultative anaerobic growth is highest in the presence of oxygen (O2).
True
Obligate anaerobes possess superoxide dismutase (SOD) enzymes.
False
List the 3 advantages that microbes receive from living in a biofilm.
1.Shared nutrients
2. Shelter from harmful factors
3. Shared information
Which of the following microbe classifications do not require any special precautions when handling?
Bio-safety Level 1
