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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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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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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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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What Is Life Worksheet BIO/101 - Week One March 14‚ 2013 Karen Hagen What Is Life Worksheet 1. Find a media piece—article‚ video‚ presentation‚ song‚ or other—related to the scientific method‚ creating hypotheses‚ or designing experiments. Include the link or reference citation for the piece and describe how it helped you better understand how the scientific method is used to create hypotheses and experiments. This informative video explains the steps in the Scientific Method in a
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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 3.glucose solutionOrangeNo changeDried upNo change 4.sucrose solutionNo changeNo
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Week Three: Cells – The Building Blocks of Life Details Due Points Objectives 1.1 Describe the processes of photosynthesis and cellular respiration. 1.2 Determine the relationship between environmental factors in photosynthesis. 1.3 Describe the cell cycle. 1.4 Describe the processes and outcomes of mitosis and meiosis. Reading Chromosomes Review Section 5.1 in Chapter 5 of BioInquiry. Reading Bioenergetics Review Chapter 10 of BioInquiry. Viewing Mitosis Watch
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Associate Program Material Levels of Life Worksheet Complete all three parts of this worksheet. Part I: Atomic Structure – Fill in the missing information on atomic structure and organic compounds. |Atomic Structure | |Subatomic Particle |Charge |Location in an Atom
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Chem-102 Lab Dr. Sobhi Experiment #3: Spectrophotometric Determination of Tartrazine Purpose The objectives of this lab include- illustrating the use of the spectrophotometer in chemical analysis‚ and generating a standard‚ or calibration curve‚ then using that curve to determine the value of an unknown substance. The spectrophotometer is one of the most powerful tools used in chemistry to find the concentration of substances in solution. It compares the colors of a known and an unknown solution
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glucose solution‚ sucrose solution‚ starch solution and distilled water were added separately into six marked test tubes. The volume added was about one finger thick in depth of a test tube. 2. 5 drops of Iodine solution was added to each test tube. 3. The sample’s reaction with iodine was recorded. 4. The samples connected by another group with 5 drops of Benedict’s solution added were heated all together in hot water bath. 5. The test tubes containing samples were taken out of the hot water bath
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