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TEAM 4: Population Genetics of Lactose superstition A. Biochemistry: Enzyme-Substrate The draw produced by charitable mammary glands contains about the alike(p) parcel of fat and less protein than cows draw, but it has more scratch than that of other(a) mammals. This carbohydrate is in the form of milk sugar, a disaccharide. mammal infants see on their mothers milk for nourishment and immunological protection. As a fresh, temperature-controlled, uncontaminated food source, the milk from mothers breast is the trounce at meeting the needs of the infant. Except for certain populations of western sandwich humans, milk consumption stops (or is greatly reduced) with weaning. It also happens that in animals and approximately humans there is a decline in the train of production of lactase with aging. Lactase is the enzyme that digests milk scribble. The hydrolysis (breakdown) of the milk sugar sugar by lactase is described be outset: [pic] B. Symptoms: near human infants produce ample quantities of lactase for milk digestion. However, in the huge majority of adult humans, the gene which specifies production of lactase is glowering off and these individuals bottomlandnot digest lactose - they ar lactose intolerant. Symptoms of lactose intolerance include cramps and diarrhea.

It goes like this: The lactose molecule, which is gargantuan, accumulates in the large intestine and affects the osmotic balance there. Since water moves across semipermeable membranes, such as the intestine, from areas of high concentration to low concentration, the accompanime nt of large lactose molecules causes water t! o enter the intestine. This can government issue in the very unpleasant go of watery canful or diarrhea. Since lactose is a sugar, it is an elevated food for the bacterium which normally inhabit our intestine (and are essential to digestion). However, the lactose will be fermented by these analogous friendly bacteria, and organic fertilizer acids which are gases, are produced by them. And we all know what tenderness intestinal...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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