Biology A - Assignment 1: Cell Membranes and Temperature Background Theory Beetroot contains betalain pigments within it’s vacuole‚ which gives it it’s purple-red colour‚ it’s this pigment which leaks out as the beetroot is heated and the cells membrane begins to break down. The practicals aim is to show the effect of temperature on the cell membrane by observing the colour change of the water the beetroot was placed in. The cell membrane is important as it controls the substances enters and
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membrane. These will be distilled water‚ sucrose‚ sodium hydroxide‚ hydrochloric acid‚ ethanol and boiled water. The treatments include immersion in these solutions‚ and exposure to high temperature. The tissue used is from the taproot of a beetroot‚ and the effect on the membrane’s permeability assessed by the amount of pigment leakage that occurs. Hypothesis ========== I predict that the most damage to the membrane will be caused by the acid or the boiling water. I think
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Pure Appl. Chem.‚ Vol. 78‚ No. 8‚ pp. 1477–1491‚ 2006. doi:10.1351/pac200678081477 © 2006 IUPAC Carotenoids and other pigments as natural colorants* Alan Mortensen Chr. Hansen A/S‚ Color Research‚ Development and Application‚ Bøge Allé 10-12‚ DK-2970 Hørsholm‚ Denmark Abstract: Food colorants may be classified into synthetic‚ nature-identical‚ inorganic‚ and natural colorants. Natural colorants for food are made from renewable sources. Most often‚ the colorants are extracted from plant
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its body temperature does so too and its metabolic rate will be expected to rise or fall accordingly. So the temperature of the organism must be kept constant during the procedure. In this investigation we shall test the hypothesis that as the concentration of caffeine changes‚ the heartbeat rate (cardiac frequency) of Daphnia also changes. Fortunately Daphnia is relatively transparent and its heart can be seen quite easily under the low Power of the microscope. Setting up the experiment 1.
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Write your name here Surname Other names Centre Number Candidate Number Edexcel GCE Biology Advanced Subsidiary Unit 1: Lifestyle‚ Transport‚ Genes and Health Thursday 8 January 2009 – Morning Time: 1 hour 15 minutes You do not need any other materials. Paper Reference 6BI01/01 Total Marks Instructions se b ink or • Uill inlack boxesball-point pen. page with your name‚ a the top of this • F the andt candidate number. centre number uestions. • Answer all qquestions
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decorate the hall. * Get stationary for the leadership day. * Clean hall * Decorate and arrange hall * Start cooking food for the day * PROJECT RESOURCES * Cleaning materials * Brooms(10) * Mops(10) * Cleaning detergents * Chairs (100) * Stationary * Pens(100) * Notepads(100) * Flip boards(100) * Makers(100) * Name Tags(100) * * Projector and a laptop(1) * Public address system(1 set) * Decorating materials *
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www.maxpapers.com UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education *0191634512* 0610/61 BIOLOGY Paper 6 Alternative to Practical May/June 2013 1 hour Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams or graphs
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completely sterile before it is sealed. The acidity or salinity of the solution‚ the temperature of fermentation‚ and the exclusion of oxygen determine which microorganisms dominate‚ and determine the flavor of the end product.[4] When both salt concentration and temperature are low‚ Leuconostoc mesenteroides dominates‚ producing a mix of acids‚ alcohol‚ and aroma compounds. At higher temperatures Lactobacillus plantarum dominates‚ which produces primarily lactic acid. Many pickles start with Leuconostoc
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effect of variation in temperature on the permeability of cell membranes using fresh beetroot Aims In this investigation‚ you will subject fresh‚ washed beetroot discs to different temperatures to investigate the effect of temperature on the permeability of the plasma membrane. Overview The beetroot discs will be placed in distilled water at different temperatures. You will compare the intensity of the beetroot pigment that has leaked out from the cells subjectively and possibly objectively using
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The Effects of Household Detergent on Germination and Biomass Production of Pinto Beans and Radishes Introduction and Background: Plants are a diverse kingdom that gives vital sources of food‚ energy‚ and oxygen to sustain life on the planet. Plant classification is divided into four major groups including mosses and liverworts‚ ferns‚ conifers‚ and flowering plants. Plants we most commonly identify ourselves with is edible fruits and vegetables. There are a variety of types of vegetables from
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