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What does nutrient agar contain that makes it a good growing medium for bacteria?
Wiki User
∙ 7y ago
Agar, in agar plates used in culturing bacteria and other microorganisms, consists of a gelling agent, and is an unbranched polysaccharide obtained from the cell walls of some species of red algae, primarily from the genera Gelidium and Gracilaria, or seaweed. As very few bacteria are able to decompose the actual agar itself, nutrients such as glucose must be added to the agar mixture to allow bacterial growth. It is these various nutrients that the bacteria feed on to survive.
The typical agar plate contains:
# A carbon source such as glucose for bacterial growth # Water # Agar # Various salts needed for bacterial growth # A source of amino acids and nitrogen (e.g., beef, yeast extract) This particular mix is an undefined medium because the amino acid source contains a variety of compounds with the exact composition being unknown. In this case, most bacteria will be using all the above except 3. Agar for nutrition.
Wiki User
∙ 14y ago
Wiki User
∙ 9y agoBacteria uses peptones for nutrients in a nutrient agar. Peptones are a soluble form of proteins that are formed in the early stage of protein breakdown, during digestion.
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What can the researcher conclude about the bacteria that grow on the nutrient medium?
that they are resistant to ampicillin, they contain recombinant DNA, and they contain a human gene.
A mass of bacteria growing in a petri dish?
Any bacteria with right nutrient in vitro can be cultured. This method is very useful when carrying out any experiment. As long as nutrient medium is maintained bacteria will grow with no problems in a petri dish.
What is the process called when you place the bacterial sample on the petri dish?
Inoculation is the process were in you will introduce bacterial samples on a nutrient broth or nutrient agar. If the medium you use contain bacteria it is now called inoculum. there are different technique in introducing bacteria in the medium like streaking, spreading, pouring.
How does autotrophic bacteria get food?
They are grown on medium that contains the nutrient that they cannot synthesize
How does milk differ from water as a bacteriologic medium?
Milk contains natural sugars which can feed bacteria. It can also contain bacteria due to improper storage or handling. Water that is running swiftly over rocks can defeat bacteria in it. Stagnant water is most likely to contain bacteria.
What can the researcher conclude about the bacteria that grow on the nutrient medium?
that they are resistant to ampicillin, they contain recombinant DNA, and they contain a human gene.
A mass of bacteria growing in a petri dish?
Any bacteria with right nutrient in vitro can be cultured. This method is very useful when carrying out any experiment. As long as nutrient medium is maintained bacteria will grow with no problems in a petri dish.
What is the process called when you place the bacterial sample on the petri dish?
Inoculation is the process were in you will introduce bacterial samples on a nutrient broth or nutrient agar. If the medium you use contain bacteria it is now called inoculum. there are different technique in introducing bacteria in the medium like streaking, spreading, pouring.
How does autotrophic bacteria get food?
They are grown on medium that contains the nutrient that they cannot synthesize
Complex culture media?
Complex culture media is a type of nutrient for growing bacteria that does not have exact composition. For example it may contain beef broth which has many nutritional components but the exact ratio of each component is not known. The opposite would be defined medium which contains exact amount of specific nutrients.
What is the source of mineral elements like calcium that bacteria obtain in nutrient broth?
A nutrient broth is contains substances that are required for the growth of microorganisms such as bacteria. The bacteria obtain their minerals and vitamins from peptone, meat and yeast extract that comprise the broth.
Can you use blood to grow bacteria on petridishes?
Bacteria will grow in blood but no the growing medium in petri dishes should be clear agar.
What type of bacteria is most likely to go through fermentation?
Assume you are growing bacteria on a lipid medium that started at pH 7. The action of bacterial lipases should cause the pH of the medium to increase or decrease? Why?
What is hydroponic growing mean?
Hydroponics (From the Greek hydro, water, and ponics, labour) is a method of growing plants using mineral nutrient solutions, in water, without soil. Terrestrial plants may be grown with their roots in the mineral nutrient solution only or in an inert medium, such as perlite, gravel, mineral wool, or coconut husk.
How are most bacterial infection get transmitted?
the bacteria comes in contact with nurturing, growing medium like mucus or saliva
Why does E-coli grow in nutrient broth better than in thio-glycolate broth?
The purpose of the thio-glycolate broth, which, if memory serves, is a semi-solid agar, is to determine oxygen requirements. E. coli is a facultative anaerobe which means it prefers aerobic conditions but can grow (to a lesser extent) anaerobically. So you will see growth at the top of the thio-glycolate tube mainly where there is oxygen, perhaps some just along the shallow stab line from inoculation. It will not permeate throughout the medium since it prefers aerobic respiration and oxygen is available at the top.
How does milk differ from water as a bacteriologic medium?
Milk contains natural sugars which can feed bacteria. It can also contain bacteria due to improper storage or handling. Water that is running swiftly over rocks can defeat bacteria in it. Stagnant water is most likely to contain bacteria.
