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Micro Lab Exercise 3

QuestionAnswer
A medium whose exact chemical composition is known is called? A chemically defined medium.
Media for which the exact chemical composition varies slightly from batch to batch is called? Complex media
A commonly used liquid complex medium is called? Nutrient broth
When agar is added to nutrient broth, it becomes a solid medium called? Nutrient Agar
An extract from marine red algae. Agar
At what temperature does agar liquefy ? It remain in a liquid state until cooled to? 100°C 40°C
Nutrient Agar contains what ingredients? Peptone, beef extract, sodium chloride, agar, and distilled water
The most common method of sterilizing culture media that are heat stable is? Steam sterilization or autoclaving
Contain solid media and provide a large surface area for examination of colonies is? Petri Plates
Intentionally introduced Inoculated
A population of cells that arises from a single bacterial cell? Colony
Cells that have settled to the bottom of the tube. Sediment
Clumps of microbial cells called (suspended in the broth)? Flocculent
Membrane across the surface of the broth is called? Pellicle
Broth is cloudy. Turbidity
What is the advantage of using petri plates rather than test tubes in microbiology? They are easily stored. They have a larger surface to observe growth.
What are bacteria using for nutrients in nutrient agar? Beef extract and peptone.
What is the purpose of the agar? The agar is a solidifying agent.
What is human body temperature? 37°C
Created by: KamiSeago
 

 



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