Lactose

probably because humans are evolving. Humans are still evolving in different ways. The ways humans digest lactose is changing. Humans are losing their wisdom teeth instead of keeping them. Also humans are getting mutations against malaria. You might notice that you need to take your wisdom teeth out and that’s just because humans are evolving. Humans have evolved in the way we digest lactose. “This is because they carry a regulatory change in the region of DNA that controls the expression of the…

Lactose intolerance is widespread. Lactose intolerance can either be temporary or permanent. Cases that occur in young children are often caused by an infection in the digestive system and may only last a few weeks. Most cases that develop in adults are inherited and are usually permanent. Fortunately there are other options available for people with lactose intolerance such as almond and coconut milk. It is also important to be aware that lactose is often added to pre-prepared…

A yellow color change in the lactose fermentation broth would signal a positive result. Bacteria A was able to ferment lactose and displayed a yellow color change as seen in figure 6. Along with the lactose fermentation test, a MacConkey plate streak was performed. This test was not necessary, but it is used to select for Gram-negative bacteria, and can also indicate lactose fermentation. The MacConkey test can be seen in figure 6, however, the results lactose fermentation results are not…

tube turns yellow after incubation then it indicates lactose/sucrose/glucose positive, depending in what tube. If the tube stays the same color then it will indicate lactose/sucrose/glucose negative. (“Phenol Red Broth”, n. d). The Litmus Milk tube is to indicate if a bacterium can metabolize lactose as a source of energy. If the tube turns pink after incubation then it indicates lactose positive, but if the tube turns dark purple then its lactose negative (“Litmus Milk”, n. d). However, some…

honey and food production, this is important for energy. Glucose and fructose can be converted into fat if it was to be highly consumed. Whereas, sucrose and lactose are disaccharides, which are two monosaccharides linked together. The major source for sucrose is table sugar and plants. Plants use sucrose to transport glucose while, lactose is found in primary sugar which is in milk and milk products. These are dietary carbohydrates, consumed to monosaccharides. Xylitol is a natural…

cocci bacteria, Micrococcus luteus, Staphlococcus aureus, and Staphlococcus epidermidis. Upon realizing Micrococcus luteus tested negative for the voges-proskauer, lactose fermentation, and glucose fermentation tests it was automatically counted out. Staphlococcus epidermidis tested negative for both the voges-proskauer and lactose fermentation test. To further validate the conculsion of the unknown being Staphlococcus aureus, refer to the mannitol salt agar plate. The mannitol salt agar…

The possibilities of two unknown microorganisms lead to phenylalanine deaminase test. The detection of phenylalanine deaminase enzyme was carried out by adding ferric chloride to phenyaline slant. When ferric chloride was added to phenylalanine deaminase tube, it turned into army green color( positive result) which indicated that unknown microorganism contains phenylalanine deaminase enzyme. On the other hand, no color change in the slant indicates negative result for this test. The choices…

 COMPOSITION OF MILK Milk is nearly complete natural food on the earth. It contains water, fat, protein, lactose and minerals as major constituents. The proportions of these constituents vary with species of the animal. For example, Mare’s milk contains only about 1.6% fat, while Reindeer’s milk contain 22.5% fat. Apart from this, the composition also varies with several other factors, viz., the breed of animal, the feeding pattern, season, lactation period, age of animal, environment, etc..…

survive. If there is growth present on the EMB media it means it is a Gram negative rod. The color of the results determine if lactose fermentation is present. If the sample is colorless then there is no lactose fermentation present. If the bacteria is purple then lactose fermentation is present. If the results have purple and green colors then the sample has great amounts of lactose fermentation. The lab manual explains “If a microorganism produces an enzyme called citrate permease, it will…

them applicable as functional sweetener. (Splechtna, Nguyen et al. 2006) TRANSGALACTOSYLATION Galacto-oligosaccharides basically are the products of the transgalctosylation procedure which is catalyzed by the enzyme beta-galactosidase when using lactose and some other galactosides as substrate. Beta-Galactosidases are basically classified as Hydrolases. In this reaction mainly hydrolysis of glycosidic- bond is done in which the galactosyl acceptor is water. Transgalctosylation include both…