Digestive system 6.1.1 explain why digestion of large food molecules is essential * Large food molecules are polymers‚ broken down into monomers in order to be absorbed into the blood * Humans eat substances by other organsims‚ many which are not suitable for human tissues therefore they must be broken down and reassembled in a form that is suitable * Many molecules in foods are too large to be absorbed by the villi in the small intestine‚ the large molecules have to be broken down
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1. Cellulose‚ starch‚ and glycogen are very similar‚ yet very different. Describe the process by which each of these molecules is formed. Why does the subtle difference in how the simple sugar monomers are bonded in starch and cellulose affect how the two molecules are used? Cellulose is built from glucose molecules bonded covalently together through a process known as hydrolysis. Hydrolysis is a chemical process in which a molecule of water is added to a substance. Each alternating glucose
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Background of the study Due to the overwhelming demand of plastic bag production and its effects on our environment‚ our landfills are crammed with these non-biodegradable materials. Substances used in the manufacturing brought forth various harmful chemicals which worsen over time. As the destructive compounds such as Chlorofluorocarbons were introduced‚ the complete deprivation of the Ozone Layer starts. However‚ scientists and nature preservers alike managed to overthrow this hazard‚ but not
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materials. The core problem of these starch based plastics is their hydrophilic character and the fact that they tend to become brittle with ageing. Unmodified starch is too much hydrophilic to be used as food packaging material. Chemical modification must be carried out in order to make them hydrophobic. These modifications are grafting‚ alkylation-especially esterification including acetylation. The purpose of the project is to prepare acetylated starches/starch esters of different Degree of Substitution
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BIOS140 iLab #6: Digestion and Nutrition Worksheet Name: Complete the following questions and submit your report. This document contains 3 pages. The total lab is worth 35 points. 1. Observe the following model of the digestive system. Label all of the major organs. 2. There are many online tools that allow you to calculate your BMI. Use one of these tools to calculate your BMI. BMI Values Fill in Your Information Underweight Less than 18.5 Normal weight 18.5–24.9 Overweight 25–29.9 Obese
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fungal Amylases and evaluate how temperature affects the catabolic rate of enzymes. Enzyme reaction rate was measured using an Iodine test in which drops of starch solution with either fungal or bacterial Amylase exposed to different temperatures were mixed with Iodine. Iodine is a dark blue color in the presence of starch and turns light yellow in its absence. Bacterial Amylase had an optimal temperature of 55°C‚ meaning that starch was broken down the fastest at this temperature. Fungal Amylase showed
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Abstract This experiment was carried out to monitor the ability of the Barley Amylase Enzyme to effectively break down starch in solutions that are increasing in neutral pH. To do this the experiment was carried out so that tubes containing a reaction solution of the Amylase enzyme and starch were simultaneously mixed. The reactions were then introduced to I2-KI‚ which stopped the reactions‚ at two minute intervals. Each of these trials was repeated three times to ensure proper accuracy. After
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Date: 2/27/2013 Title: To test for starch Aim: To test certain foods to see if they contain starch Materials: foods containing starch‚ iodine‚ potassium iodine‚ water‚ Benedict’s solution Equipment: test tubes‚ test tube racks‚ water baths (boiling)‚ eye protection Method: 1) Two to three drops of the iodine were dropped in the potassium iodine solution to 2cm cube of the starch suspension. 2) Then a suspension was made up of the foods by mixing it with water. 3) Then two to three
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is broken down in our mouths; it is crushed and ground by teeth. It is also the first stage of digestion because it breaks down the food‚ which needs to happen
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Human Digestion Summary SCI 241 August 8‚ 2013 Human Digestion Summary We all love to eat. I remember my parents used to tell me that in order for my food to digest properly‚ I would have to chew it one hundred times on both side to make it small as possible. They said that if the food was smaller it could digest quicker and easier. But most people do not know what happens to their food after they have chewed it up and swallowed it. Some may think that right after the food is swallowed‚ it
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