Introduction Starch is composed of α-amylose and amylopectin. The structure of α-amylose consists of long polymer chains of glucose units connected by an α (1-4) linkage. Amylopectin consists mainly of α (1-4) linked glucose residues but is a branched molecule with α (1-6) branch points every 24 to 30 glucose residues on average. As a result of the bond angles in the α (1-4) linkage‚ amylose actually forms a spiral much like a coiled spring. Amylose is responsible for the formation of a deep blue
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Introduction This practical experiment was performed in an attempt to observe how enzymes (starch phosphorylase in particular) are affected by varying its temperature before introducing it to the substrate it will be reacting with. A catalyst (enzyme) is a substance that changes the rate of a reaction; for a reaction to take place at all‚ the enzyme must first come into contact with the substrate. Enzymes are subject to a number of factors which effect how fast they can cause a reaction with a substrate;
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sizes of molecules and how the chemical reactions take place. Therefore‚ the experiment was conducted using glucose and starch solution inside the dialysis tube. The starch and glucose that was put inside the dialysis tube help identify which of the two will reacted with potassium iodide inside the breaker‚ as the latter passed from the beaker into the tube‚ the glucose/starch solution’s change of color showed that the potassium iodide was small enough that it able to pass through from the solution
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Experiment 1 Salivary Gland Chromosome Preparation Introduction: Microscopic‚ threadlike part of the cell and a structured DNA which carries hereditary information in the form of genes is a chromosome. Endomitosis is mitosis without nuclear or cellular division. This produces many copies of the same chromosome in a single nucleus (Kim 2004). For this experiment‚ I hypothesize that D. melanogaster undergoes endomitosis meaning without cellular mitotic division. If it undergoes endomitosis‚ then
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released. These are the most commonly made of recycled and/or natural organic materials. They utilize nature’s abundant supplies to create a replica or substitute for our plastics. One example would be the “Biodegradable plastic bags” made from the starch of the Cassava plant (Manihot esculent). The new plastic has been able to capture the interests of buyers‚ enabling it to advocate the benefits and obvious effects one can receive from using an eco friendly product. To further elaborate the example
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Decision sheet for A-One Starch Products Limited (B) Decision Problem: Preparation of a marketing strategy for Gluco-One given the pricing pressures. Options: 1. Explore new markets 2. Small number of High value customers Vs Many Low Value Consumers 3. Incur more costs to maintain the quality Vs Cut back on number of customers Decision and Rationale: 1. New Markets: Beer industry (220 million liters) at present is not using Liquid Glucose as a raw material. It would not be
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EWB-UK Workshop Guide Make your own Bio-Plastic Description A workshop focusing on the problems of plastics made by fossil fuels and a look into making your own bio-plastic. At a glance Total time: 1 hour Learning Styles: Visual‚ auditory‚ practical‚ participatory‚ teamwork Objectives: To learn about the challenges facing fossil fuel plastics and how to make your own bio-plastic Audience: Anyone Max/Min no. of participants: N/A (Dependant on amount of materials) Timetable
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I believe that the reason the cell appeared smaller after being exposed to starch solution was because water molecules move out of the cell because the concentration of water inside the cell was greater than outside the cell. I believe this for a few different reasons. We were given 3 different explanations to explain why the cells appear smaller after being exposed to sugar water. These include: That the sugar molecules are not able to enter the cell‚ but the sugar molecules push on the cell membrane
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Lab : Iodine-starch Clock Reaction Pre-lab: Before the lab was conducted‚ the concentration of the Iodate ions to be in the mixture made by dissolving specific volumes of solution A with a constant concentration and water was calculated using the dissolution formula: C1V1 = C2V2 Sample Calculation 1: Concentration of the Iodate ions: For mixture 1: C2 = C1V1/ V2 = (0.020mol/L) x (0.003L)/(0.01L) = 0.006mol/L The same calculations were used in the calculating of the
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Introduction Have you ever bit into a nice big juicy bacon double cheeseburger and your mouth began to salivate before the food has entered your mouth? The reason why you salivate is because your body wants to release an enzyme called amylase. Amylase is the enzyme found in your saliva. The purpose of this enzyme is to help in the digestion process (McD‚ 2002). Enzymes are biological catalyst that help speed up the reaction by lowering the activation energy. These enzymes allow your food to be digested
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