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Why in presumptive test only lactose broth is used not glucose broth?
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Saline lactose broth sterilization method?
If the broth contains only saline and lactose, it can be autoclaved. However, it it contains peptide growth factors depending on the application, it will have to be filtered prior to use since protein-containing media is sensitive to heat.
Why is lactose converted into glucose and galactose during food processing?
Converting lactose into glucose and galactose allows lactose-intolerant people to consume milk products. Glucose and galactose also taste sweeter than lactose so the need for additional sweeteners in flavored milk products is reduced. As glucose and galactose are more soluble, it gives ice-cream a smoother texture. Glucose and galactose can be fermented by bacteria more quickly so the use of these monosaccharides shortens the production time of cottage cheese and yogurt.
Why does Bacillus cereus ferment Glucose and not Lactose or Sucrose?
Because bacillus cereus is a Gram-positive, spore-forming, and rod-shaped, it\'s only able to ferment glucose.
What would happen to the lac operon if a bacterium were growing in the presence of both glucose and lactose?
The regulatory portion of the operon is the only portion that would be transcribed.
Can yeast ferment galactose and lactose?
check out this link: http://www.madsci.org/posts/archives/2005-11/1132509463.Cb.r.html what it basically says is that yeasts cannot use lactose becasue they cannot break it down into its components (galactose and glucose), so they can only use lactose when they are genetically engineered to produce lactase (an enzyme which breaks down lactose into its constituent sugars).
The lac operon enables a bacterium to build the proteins needed for lactose metabolism only when what is presented?
Only when lactose is present; if glucose is present the cell will metabolize glucose over lactose due to glucose being easier for the cell to metabolize.
Saline lactose broth sterilization method?
If the broth contains only saline and lactose, it can be autoclaved. However, it it contains peptide growth factors depending on the application, it will have to be filtered prior to use since protein-containing media is sensitive to heat.
Why is lactose converted into glucose and galactose during food processing?
Converting lactose into glucose and galactose allows lactose-intolerant people to consume milk products. Glucose and galactose also taste sweeter than lactose so the need for additional sweeteners in flavored milk products is reduced. As glucose and galactose are more soluble, it gives ice-cream a smoother texture. Glucose and galactose can be fermented by bacteria more quickly so the use of these monosaccharides shortens the production time of cottage cheese and yogurt.
What will happen when yeast is added to a solution of lactose?
Since yeast will only have a reaction when it is able to break down an enzyme nothing will happen when it is added to lactose. Lactose does not contain the proper enzymes or glucose to cause a reaction.
Is Pseudomonas luteola oxidase positive?
in the absence of glucose or lactose , some bacteria are able to use citrate as only source of carcon. alkaline pH change the bromothymol blue indicator from green to blue. pseudomonas can not ferment the glucose and the lactose so it use the citrate as carbon source.
Why does Bacillus cereus ferment Glucose and not Lactose or Sucrose?
Because bacillus cereus is a Gram-positive, spore-forming, and rod-shaped, it\'s only able to ferment glucose.
Do egg whites contain lactose?
Yes.
What is the function of lactose?
Lactose is broken down by lactase to form galactose and glucose which are then absorbed by the small intestine.
How does Glucose enter the Small Intestine?
glucose generated by digestion of starch or lactose is absorbed in the small intestine only by cotransport with sodium, a fact that has exceptionally important implications in medicine.
What would happen to the lac operon if a bacterium were growing in the presence of both glucose and lactose?
The regulatory portion of the operon is the only portion that would be transcribed.
Can yeast ferment galactose and lactose?
check out this link: http://www.madsci.org/posts/archives/2005-11/1132509463.Cb.r.html what it basically says is that yeasts cannot use lactose becasue they cannot break it down into its components (galactose and glucose), so they can only use lactose when they are genetically engineered to produce lactase (an enzyme which breaks down lactose into its constituent sugars).
Does milk fat contain lactose?
Lactose, or milk sugar, is a natural component of milk. In regular milk, the lactose portion is 5%. In butter, the lactose portion is about 0.1%. Therefore, butter cannot be considered lactose-free.
