Glossary of micro ch. 3 test 2
Created by cadomanis
Other Decks By This User
- introduction of a sample into a container of media to produce a culture of observable growth
- separating one species from another
- conditions that allow growth
- the morphology, number and arrangement of the growth of an organism that has been cultured
- the specific genus and species of an organism that was cultured
- a mound of cells from which an individual bacterial cell that has been separated from other cells and has space on a nutrient surface that has grown
- how many species are in a colony?
- what are the three types of isolation techniques?
- streak plate
- what are the three properties under which media can be classified?
- physical state
- what are the different physical states of media?
- what are the types of chemical composition that media can be?
- what are the functional types of media?
- general purpose
- what is liquid media?
- a broth that is used that does not solidify
- what are semisolids?
- media with a clot-like consistency that contains a soildifying agent
can be agar or gelatin
- what is solid media?
- firm surface for colony formation
contains a solidifying agent and is liquefiable and nonliquifiable
- what is the most commonly used solidifying agent?
- polysaccharide isolated from red algae
solid at room temp
liquifies at 100 deg. C
provides framework to hold moisture and nutrients
not digetable for most microbes
- what are the most commonly used media?
- nutrient broth and nutrient agar
- nutrient broth
- liquid medium containing beef extract and peptone
- nutrient agar
- solid medium containing beef extract, peptone and agar
- synthetic media
- contains pure organic and inorganic compounds in an exact chemical formula
- complex or nonsynthetic media
- contains at least one ingredient that is not chemically definable
- general purpose media
- media that grows a broad range of microbes, usually nonsynthetic
- enriched media
- contains complex organic substances such as blood, serum, hemoglobin or special growth factors required by fastidious microbes
- selective media
- contains one or more agents that inhibits growth of some microbes and encourage growth of the desired microbes
- differential media
- allows growth of several types of microbes and displays visible differences among desired and undesired microbes
- reducing medium
- contains a substance that absorbs oxygen or slows penetration of oxygen into medium
used for growing anaerobic bacteria
- carbohydrate fermentation medium
- contains sugars that can be fermented, converted to acids, and a pH indicator to show the reaction
basis for identifying bacteria and fungi
- pure cultures
- grows only single known species of microorganisms
- mixed cultures
- hold two or more identified species or microorganisms
- contaminated cultures
- once pure or mixed culture that has unwanted microbes growing
You must Login or Register to add cards