Use appropriate chemical tests to identify different dietary nutrients

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Unit 11- Physiology of Human Body Systems P5 - Use appropriate chemical tests to identify different dietary nutrients MineralsBiochemical testPositive results Why are they needed and the implications without them  StarchThe easiest way to test for starch is by adding an Iodine or potassium iodide solution.This is commonly used on bread. The iodine or potassium iodide solution will colour of the bread from brown to black. Starch influences the speed at which glucose is digested in the body. Starch converts into sugar and provides cells with energy. However if the cells do not require that energy, it is stored and used at a later time. Excess amounts of starch would turn into fat. Without a healthy supply of starch people would get tired and sluggish, due to the lack of energy in their body. Digestive difficulties, heart disease and kidney stones can also result from a lack of starch.  Sugars (excluding sucrose)By adding Benedict’s solution, the substance
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being tested would need to be placed in a water bath and heated at 80°C in order to find out whether or not a sugar is present.If a sugar is found, the colour will change from blue to yellow/red.Sugar is used to fuel the human body. They do this by flowing into the bloodstream at a slower absorption rate which is healthy in the body. Without sugar people can become hypoglycemic which results in low energy levels and fainting. Sucrose sugarTo test for sucrose the substance would need to be heated with dilute hydrochloric acid. This is so that that ...

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