Lab_39_HWanswers - Exercise 39 Homework Chemical and...

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Exercise 39 Homework Chemical and Physical Processes of Digestions Answer all the following questions and submit it the next lab session 1) What is an enzyme Large protein molecules produced by body cells. They are biological catalysts, meaning they increase the rate of a chemical reaction without themselves becoming part of the product. 2) List three characteristics of enzyme a) Specificity: Each enzyme catalyzes only one type of reaction. An enzyme’s specificity is determined by the ability of its active sites to bind only to substrates with particular shapes b) Saturation limits i) When substrate concentrations are high enough that every enzyme molecule is cycling through its reaction sequence at top speed, further increases in substrate concentration will not affect the rate of reaction. c) Regulation. (1) enzyme are regulated in the cells by other enzymes or compunds that will activate or deactivate the enzymes. i.e feed back mechanisms. 3) A substrate is a) Substrates are organic food molecules which the enzymes break down by adding water to the molecular bonds, thus cleaving the bonds between the subunits or monomers. 4) What is hydrolyses The breakage of a chemical bond through the addition of a water molecule; the reverse of dehydration synthesis. 5) Salivary amylase convert starch to A mixture composed primarily of disaccharides (two simple sugars) and trisaccharides (three simple sugars). 6) Amylase secreted from what organs Salivary glands (parotid and submandibular), stomach and pancreas. 7) What is the purpose of Lugol’s solution Starch detection in our experiment. Lugol's solution works as an indicator because it will stain starches due to iodine's interaction with the coil structure of the polysaccharide.
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8) What is the purpose of Benedict’s solution Benedict’s solution is used to test for simple sugars, such as glucose, in our experiment. It is a clear blue solution of sodium and copper salts. In the presence of simple sugars, the blue solution changes color to green, yellow, and brick-red, depending on the amount of sugar. 9) The brush border enzyme maltase breaks down maltose to 2 glucose molecules. 10) The brush border enzyme sucrase breaks down sucrose to 1 glucose molecule and 1 fructose molecule. 11) The brush border enzyme lactase breaks down lactose to 1 glucose molecule and 1 galactose molecule. 12) The monosaccharides of Sucrose are glucose and fructose. 13) The monosaccharides of Lactose are glucose and galactose. 14) In the small intestine, glucose and galactose are absorbed via cotransport. 15) In the small intestine, fructose is absorbed via
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Lab_39_HWanswers - Exercise 39 Homework Chemical and...

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