Lactase

Lactase is an enzyme located in the mammalian small intestine that breaks down lactose into sugars, glucose and galactose. It is a necessary enzyme in order to digest lactose, a milk sugar, which cannot be absorbed directly. Lactose is a sugar found only in mammalian milk According to the article, there is high production at birth and then lactase production starts decreasing in adulthood. However, through recent studies, it is shown that there is a high variation in lactase production among individuals

likely to be lactase persistent than those who do not. Communities such as these were often seen in places such as Europe and Africa, which can likely be an explanation for why lactase persistence is often found in those with European and African ancestry, while those with Asian backgrounds are often lactase intolerant. Lactose, which is the main sugar in milk, is very difficult for the small intestine to process. Because of this, cells are required to make an enzyme referred to as lactase, which is

an assumption was made that by in large, the percentage of lactase persistent in the class that was expected was going to be near 95% (Curry, 2013). However, such a high percentage was not found. Of the class, only 49.3% of individuals were determined to possess a genotype that results in a phenotype of lactase persistence. Conversely, 40.8% of the class was found to carry the genotype lct/lct which results in the phenotype of lactase non-persistence. Therefore, the results are nearly 50% off from

occurs”[2]. “Lactase is an enzyme that breaks down lactose, the sugar in milk. It is produced by the cells lining of the small intestine. Most people are born producing it, but often make less of it as they age, which causes lactose intolerance the symptoms for this include nausea, bloating, and diarrhea to name a few. This enzyme is produced

order to digest the lactose that milk has the enzyme lactase is needed to break it down. Lactase is a large glycoprotein and has two active sites. These active sites can activate and determine a variety of β glucoside, β galactoside, lactose, and others (Swallow). The enzyme lactase is a dominant genetic trait that is inherited and is known as lactase persistence. However, this persistence can change over time. When a baby is born the lactase activity is high and is very important for a child’s

(monosaccharides) then digested/absorbed. In order to do this, the small intestine produces an enzyme called lactase. What lactase does is attaches itself to the lactose molecule and breaks it down into glucose and galactose. These molecules aren’t as big or complicated so they’re easily absorbed by the small intestine and into the bloodstream. Lactose Intolerance is when the body doesn’t actually produce the lactase enzyme, so the lactose can’t be broken down and absorbed. People with Lactose intolerance usually

likely diverged at a minimum of 100 thousand years ago from all human ancestors (11 - Breton, G., et al, 2014). Assuming the data could be collected for the Khoe population, the hypothesis being tested through further evaluation whether the recorded lactase persistence is realistic given the subsistence behaviour of the current population. This would require archaeological evidence for the pastoralist population by the original ancestors of the area. The introduction of pastoralism to southern areas

The enzyme that will be used in this experiment is lactase. Lactase is an enzyme that breaks down a sugar found in milk called lactose into glucose and galactose. Lactase is found in the small intestine, and is naturally produced by the body. If someone’s body does not produce the lactase properly, or the lactase itself doesn’t act properly, that person would be considered lactose intolerant. This means your body would not be able to digest milk properly, and you could suffer symptoms such as cramping

NaCl Concentration and its Effect on Lactase Enzyme Activity Amanda N Garcia Bio Lab Section 22 Texas State University Abstract Lactose is a sugar that can be put into smaller molecules, glucose and galactose. Lactose is when you are not able to digest milk and dairy meaning that the enzyme lactase that breaks down lactose is not functioning properly. ONPG was used as a substitute for lactase because even though it is colorless it helps show enzyme activity by turning yellow. This experiment measured

Laboratory 6: Lactase Enzyme Lab Report Introduction Enzymes are types of proteins that work as a substance to help speed up a chemical reaction (Madar & Windelspecht, 104). There are three factors that help enzyme activity increase in speed. The three factors that speed up the activity of enzymes are concentration, an increase in temperature, and a preferred pH environment. Whether or not the reaction continues to move forward is not up to the enzyme, instead the reaction is dependent on a reaction’s