are the long chains of monosaccharide‚ which is called the polymer of carbohydrates. Monosaccharide and disaccharides can be tested by the Benedict’s test‚ as they are reducing sugars. Polysaccharides such as starch and glycogen can be tested by the iodine test. Also‚ carbohydrates are consumed to provide energy to our body and they are useful in metabolism. Therefore‚ it is one of the essential macromolecule that we have to consume. 2. Lipids Lipids are made up of a glycerol molecule and three fatty
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presence of iodine. The iodine molecule slips inside of the amylose coil.The amount of blue complex that starch gives with iodine can be measured by using a spectrophotometer. α-amylases are found in saliva‚ pancreatic juice‚ human breast milk‚ serum and certain tissues such as the liver. This enzyme catalyzes the hydrolysis of α (1-4) linkages in starch by breaking it down to maltose and some glucose. As the starch is broken down‚ the coiled structure of α-amylase is unfolded. Therefore‚ iodine will
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Title: Kinetics: The Rate of a Chemical Reaction Objectives: 1. To study the kinetics of chemical reaction‚ 2 I- + S2 O82- I2 + 2 SO42- . 2. To study the effects of reactant concentration (persulphate‚ S2O82-‚ and iodide‚ I-) and temperature on the rate of chemical reactions. ( i) Study the effect of 0.20M (S2O82-) on the rate of chemical reaction. ( ii) Study the effect of 0.10M (S2O82-) on the rate of chemical reaction. ( iii) Study the effect
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Chemistry project Aim: To compare rate of fermentation of given sample of wheat flour‚ gram flour‚ rice and potatoes. Submitted By: Name: Ipshita Chatterjee Class: XII – A Roll No.: 12 Index: S.no | | Page no. | 1. | Certificate | | 2. | Acknowledgement | | 3. | Declaration | | 4. | Objective | | 5. | Introduction | | 6. | Requirements | | 7. | Procedure | | 8. | Observations | | 9. | Bibliography | | Objective: In this experiment the main objective is to
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Test for Carbohydrates Result Starch suspension When the yellowish-brown iodine was added into the starch suspension‚ the starch suspension was changed into dark blue. Potato slide Discussion Starch suspension When the yellowish-brown iodine was added into the starch suspension‚ the starch suspension was changed into dark blue. This is due to the yellowish-brown iodine changed into dark blue when there is a presence of starch. This shows a positive test for
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of substrate can fit to the enzyme’s active site. The action of enzymes is reversible and enzymes can be reused. This means that an enzyme can catalyze lots of substrates. Materials Starch solution‚ sodium chloride solution‚ amylase solution‚ iodine solution Apparatus Test tubes‚ droppers‚ white tile‚ stopwatch‚ water bath controller Procedure 1. A water bath is set up at 30°C. 2. 3cm3 starch solution added into a test tube labeled A. 1cm3 of sodium solution is added into the test tube
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curcas seed fats and oil‚ and (2) Identification and characterization of unknown oil. After the fats and oil was extracted from seeds of Jathropa curcas‚ the percent yield was reported as 40-41%. The specific gravity‚ refractive index‚ acid value‚ iodine value‚ peroxide value‚ and the saponification value of the unknown oil sample were determined. The computed values were 1.05‚ 1.5765 ± 5.7735 x 10-5‚ 0.328 ± 2.31 x 10-3 mg acid / g oil‚ 10. g I2 / 100 g oil‚ 22 ± 2 ml / g oil‚ and 208 ± 8.49 mg
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determined by analyzing the amount of iodine (I2) formed. Two chemical reactions are useful to determining the amount of iodine is produced. I2(aq) + 2S2O32-(aq) 2I-(aq)+S4O62-(aq) (3) I2(aq) + starch I2 *starch(blue complex) (4) Reaction (4) is an iodine-starch reaction‚ used solely to determine when the production of iodine is occurring by turning a clear colorless solution to a blue color. Without reaction (4) it would be very difficult to determine how much iodine is being produced‚ due to how
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The Effects on Enzymes By Bailey Rose The Effects on Enzymes Bailey Rose 10/31/2011 Abstract In this lab exercise‚ the study of enzyme catalase‚ we viewed the breakdown of hydrogen peroxide into water and oxygen. The purpose was to isolate catalase from starch and measure the rate of activity under different conditions. Changes in temperature and pH along with Substrate Concentration and Enzyme Concentration were the conditions tested in the experiment. Our class performed
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gram-positive. The gram staining procedure consists of fixing a colony of bacteria onto a slide and then flooding the colony with various chemicals. First‚ crystal violet dye was dropped onto the bacterial cells‚ staining gram-positive cells purple. Iodine was added to fix the violet dye into place and then ethanol was used to wash the dye off the unstained cells. Finally‚ a red dye called safranin was used to stain any gram-negative cells present so that they were visible. Once the gram stain procedure
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