Figure 2. Absorption of isolated chloroplasts from spinach using multiple color filters References Dansereau‚ D. 2013.Molecular and Cellular Biology Lab Manual‚ Saint Mary’s University‚ Lab 7.
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BIOLOGY LAB REPORT PRACTICAL M1 TESTING FOR MACROMOLECULES Title : Testing for Macromolecules Abstract : To test for macromolecules (carbohydrates‚ lipids‚ nucleic acids‚ and proteins)‚ iodine solution‚ alcohol‚ aceto-orcein stain and copper sulfate solution are used. The conclusions for all of the tests are positive. Introduction: A) Carbohydrate (starch) Carbohydrates are chemical compounds that contain oxygen‚ hydrogen‚ and carbon atoms. They consist of monosaccharide
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In food it is common to use Nisin at levels depending on the food type regulatory approval. Nisin cannot be produced chemically therefore it has to be synthesised using fermentation. During fermentation various stages of growth occur and as a result different conditions can occur during this fermentation process‚ eg pH‚ most organisms produce acid as they grow and therefore in the Lag phase ( a period of adptation for the cells to their new environment‚ new enzymes are synthesized) and in
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Title: Hydrolysis of macromolecules Abstract: This lab was designed to teach the process of “hydrolysis”‚ a chemical reaction in which water is added to a polymer‚ breaking its bonds and forming smaller molecules. A hydrogen cation and a hydroxide anion (which once formed water) break apart and attach themselves to the ends of shorter polymers. Hydrolysis plays an important role in our lives and in the lives of every living thing on earth. Living organisms rely on digestion (hydrolysis)
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Conclusions At the end of Part A in this experiment‚ it can be determined that Sodium Chloride had the highest amount of conductivity tested by all groups. On the graph above‚ the data shows that NaCl (sodium chloride) held the highest amount of electrical conductivity for all groups and on the table it reads the highest numbers across its row. Also as seen in the data above‚ ethanol had the lowest amount of conductivity with sucrose‚ acetic acid‚ ammonia‚ and MgCl2 following in ascending order
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one drop of each sample corresponding to their number indicated on the filter paper (for the number of each sample‚ please refer to step 4 in Part A on p.18) 3.Leave the filter paper to dry for approximately 5-10 minutes 4.Record observations Results: Table 1: Reactions of sample substances to indicators SAMPLEBenedict’s solution + heatIodine solutionFilter paperBiuret reagent 1.protein solutionPurpleNo changeDried upPurple 2.vegetable oilNo changeNo changePaper remained translucentNo change
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Deoxyribonucleic acid (DNA) is the fundamental molecule of life encoding the genetic code for the development and functioning of every living organism and a large variety of viruses. RNA‚ proteins‚ and DNA are the main macromolecules‚ which are necessary for every form of life. The genetic system is encoded in the form of a sequence of nucleotides (guanine‚ adenine‚ thymine‚ and cytosine)‚ which are denoted by the letters G‚ A‚ T‚ and C. Most DNA molecules consist of double-stranded helices‚ composed
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Macromolecules of Life Exercise 1: Testing for Proteins In this experiment Biuret Color is added to four substances‚ egg white‚ pepsin‚ sugar‚ and distilled water to test the detection of protein in each substance. Substance Tested Predicted Results Biuret Color & Number of drops added 1. Egg White Change color 5 drops –turned a yellow/light brown 2. Pepsin Change color 5 drops- turned purple 3. Sugar No Change 5 drops-no change in color 4. Distilled Water No Change 5 drops-no
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Food Macromolecules Denise Rhodes Walden University March 20‚ 2011 Food Macromolecules “Macromolecules are a source of fuel. There are four major types of macromolecules-proteins‚ carbohydrates‚ nucleic acids‚ and lipids. This process plays important roles in the life of a cell. (Macromolecules‚ 2002). The macromolecules that was present in the packaged food product Lipids which are fats. According to (Alters & Alters
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TESTING FOR MACROMOLECULES Describe the positive test for starch. Explain how you know. The positive test for starch is adding iodine solution. In the experiment‚ the starch solution had the most dramatic reaction with the iodine solution. It turned to an opaque bluish-purple solution while other samples all turned to a colour related to orange and yellow other than the vegetable oil. But the vegetable oil was more translucent than completely opaque. Describe the positive test for
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