18 Questions
What is the range of water content in cells?
80% - 95%
Which type of microorganism grows best at temperatures above 100°C?
Hyperthermophiles
Which of the following microorganisms can be found at 140°F (60°C) or lower?
Algae
What do you call microorganisms that prefer warmer temperatures but can tolerate very cold temperatures as well?
Psychroduric
Which of the following elements is essential to life?
Oxygen
What are organisms that grow best at moderate temperatures called?
Mesophiles
What type of microorganisms grow best at moderate temperatures?
Mesophiles
What is the term for the elimination of all microbes?
Sterilization
What is the term for the process of killing microorganisms?
Cidal
Which phase of the growth curve is characterized by a period of slow growth?
Lag phase
What is the term for the process of inhibiting microbial growth using heat?
Heat sterilization
What percentage of water is present in cells?
80% - 90%
What is the ideal pH range for the growth of most microorganisms?
pH 7.0–7.4
What is the term that refers to the hydrogen ion concentration of a solution?
pH
What is the term used to describe the pressure exerted on a cell membrane by solutions both inside and outside the cell?
Osmotic pressure
What is the process by which bacteria multiply?
Binary fission
What is the term used to describe the time taken by a particular bacterial species to undergo binary fission?
Generation time
What is the term used to describe microorganisms that are difficult to grow in the laboratory?
Fastidious
Test your knowledge on factors affecting microbial growth, types of microorganisms, in vitro sites, and the importance of aseptic technique in microbiology and parasitology. Learn about the availability of nutrients and the factors influencing microbial growth.
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