wall and huge gain of water molecules will cause the burst of the cell. The main purpose of this practical work is to observe the osmosis in potato cubes‚ onion epidermis cells and visking tubes. To examine the effect of different concentrations of sucrose solutions on the plant cells and dialysis tubings. Hazards Precautions Sharp knife‚ scalpel‚ broken glass may cause injuries. Wear lab coat‚ gloves and safety goggles during the practical work. Be careful with sharp objects. Materials and Method.
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Cell Membranes and Transport Hands-On Labs‚ Inc. Version 42-0033-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing
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galactose (both six-sided sugars). Sucrose‚ ordinary table sugar‚ is also a disaccharide composed of fructose and glucose. Glucose is a six-sided sugar and fructose is a five-sided sugar. Lactase is an enzyme that breaks lactose down into galactose and glucose. Lactase can be purchased in pill form by people who are lactose intolerant. These people lack the enzyme‚ lactase‚ and cannot break down the sugar lactose into its component parts. Although lactose is similar to sucrose‚ lactase will break down only
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per gram (Suzan‚ 620). It is relatively inexpensive to produce‚ so the food industry sees HFCS an easy way to make products less expensive. HFCS is a kind of corn sugar; it is nearly identical to sucrose (table sugar)‚ which is made up of 50 percent glucose and 50 percent fructose (“What”). Sucrose and HFCS contain the same amount of calories and are of equal sweetness. High fructose corn syrup is commonly used in the food supply in the United States and other countries.
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Osmosis Experiment Diana Arrowood Grand Canyon University BIO-100L Biology Concepts September 16‚ 2011 Osmosis Experiment Directions Use the information below to complete the Osmosis Experiment. Materials 1 fresh baking potato Water Salt Four small containers (i.e.‚ drinking cups or clear glasses) A metric ruler Methods and Procedure 1) Place 1 cup (236 ml) of water in each of the 4 containers. In 2 of the containers‚ add 1 tablespoon (14.8 ml) of table salt and mix well until
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Malaysia is one of the countries with the most abundant types of tropical tree species available in nature. Woods and timber are important in the economic development of Malaysia especially in the import and export industry. One type of woods with such vital function is Leucaena leucocephala. It is a plant species with many branches and numerous clusters of flat pods that enveloped the seeds (Shelton et al.‚ 1994). L. leucocephala was first brought into Southeast Asia in the last few centuries by
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diameter of the dialysis tubing can pass through the tubings and they are retained inside the tubings.Smaller molecules such as water molecules and iodide ions are small enough to pass through the pores. The left-handed dialysis tubing contains 20%sucrose and iodine solution .The right-handed dialysis tubing contained 5% starch solution . The two entire dialysis tubings are submerged in distilled water of two separated beakers.Distilled water flows into the left-handed dialysis tubing because it has
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beakers‚ marker‚ sucrose solutions (0.0M‚ 0.1M‚ 0.2M‚ 0.3M‚ 0.4M‚ 0.5M)‚ distilled water‚ filter paper‚ cork borer and Erlenmeyer flask with stopper. Teacher’s instructions: ▪ The initial mass of every piece of potato should be similar and even. ▪ In the graphs‚ instead of joining all the points‚ having as a result a gorge line‚ we should draw the best fit line‚ thus having as a result a straight line. Procedure: ▪ First of all‚ calculate the amount of distilled water and sucrose solution each
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Identifying Biological Molecules with Colorimetric Chemical Tests Objectives Perform a series of accurate tests on biological molecules to detect the presence of carbohydrates and proteins‚ as well as the action of an enzyme on specific molecules. Introduction Unknown biological molecules can be correctly identified using various tests‚ including colorimetric chemical tests. Colorimetric tests are when a chemical reagent‚ such as Benedict’s‚ is used on a substance or solution and a certain
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Factors affecting the movement of water through osmosis Introduction In this I will be investigating what effects the movement of water through osmosis. Osmosis is the diffusion of water. It is the process in which fluids pass through a partially-permeable membrane. It is the movement of water from high water concentration to low water concentration. Plant cells react to osmosis by hypertonic‚ isotonic and hypotonic. Keywords Hypertonic – is when the water outside of the cell is lower than
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