sugars‚ starch‚ and cellulose. Protein‚ such as meat‚ eggs‚ and beans‚ consist of large molecules of protein that must be digested by enzymes before they can be used to build and repair body tissues. An enzyme in the juice of the stomach starts the digestion. Further digestion
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turns yellow when cultured with fermentative microbes and only top few mm will turns yellow when cultured with oxidative microbes. B) Starch hydrolysis Not every microbe can produce amylase to hydrolyze starch. This session is to test the ability of microbes for the activity of starch hydrolysis. The presence of blue color upon the adding of iodine indicates that starch is not hydrolyzed. C) Gelatin Hydrolysis Gelatin is the convenient substrate to test for proteolytic enzymes in microorganisms. This
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w w w e tr .X m eP e ap UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level .c rs om *0485738200* BIOLOGY Paper 2 Structured Questions AS Candidates answer on the Question Paper. Additional Materials: Electronic calculator Ruler (cm/mm) 9700/21 October/November 2009 1 hour 15 minutes READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name in the spaces provided at the top of this
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M38_MARI0000_00_SE_CH38.qxd 3/29/11 5:26 PM Page 245 R E V I E W S H E E T NAME ____________________________________ EXERCISE LAB TIME/DATE _______________________ 38 Anatomy of the Digestive System General Histological Plan of the Alimentary Canal 1. The general anatomical features of the alimentary canal are listed below. Fill in the table to complete the information. Wall layer Subdivisions of the layer (if applicable) Major functions mucosa 1) epithelium; 2) lamina propria; 3) muscularis
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Digestion process of carbohydrates: 1. Mouth- moistening of food due to the action of the salivary glands‚ polysaccharides breaks down by the salivary amylase. 2. Pulpy acidic fluid called chyme enters the stomach. Stomach acids destroy bacteria in the chyme. 3. In the small intestine (duodenum) and pancreas polysaccharides firstly breaks down into the disaccharides due to the action of pancreatic amylase and then to the monosaccharides due to action of such enzymes as lactase‚ maltase and sucrase
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enzyme works best at including pH‚ substrate concentration‚ salt concentration‚ presence of inhibitors‚ activators and cofactors and temperature. 11. Amylase catabolizes starch polymers into smaller subunits. Most organisms use these saccharides as a food source and to store energy. Amylase can be found in the saliva of humans and other mammals. (starch > sugar) a.
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Opening my eyes on my tiny bun‚ I saw the waiter getting ready to pick up my tray. With my buddies‚ Salty and Piper alongside me‚ we entered the big room full of loud mouths‚ chewing‚ talking‚ and even singing. Setting my tray down on the beautiful white clothed table I looked up‚ I saw two big hands reaching for me. This was it‚ the experience I’ve been waiting for my whole life. All my family members have experienced the place I’m about to enter‚ but they have never returned‚ obviously because
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Enzyme Study Questions 1. Definitions/terminology: o enzyme: a protein molecule that catalyzes chemical reactions without itself being destroyed or altered o catalyst: a substance that increases the rate of a chemical reaction but is not consumed or changed by it. o substrate: a substance upon which the enzyme acts. o denaturation: the partial or total alteration of the structure of a protein without change in covalent structure by the action of certain
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food test reagents at the beginning of the experiment and again after one hour. The results showed that neither starch nor reducing sugar was present in the water surrounding tubes A and B at the beginning of the experiment. (7 marks) water bath at 37ºC starch + water starch + amylase + water dialysis tubing test tubes A B water bath at 37ºC starch + water starch + amylase + water dialysis tubing test tubes A B (a) What results would be expected after one
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Unknown #1 Vomit Serratia marcescens & Bacillus cereus Biol 251 Microbiology 5/14/2009 Introduction The purpose of this study is to differentiate and identify two unknown organisms provided by the instructor in a nutrient broth. It is only known that the two organisms are from vomit; one is gram-positive and the other is gram-negative. It is necessary to first separate the two organisms by inoculating a nutrient agar plate using the streak-plate method. The
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