Purpose: The purpose of this lab is to test the effects of osmosis on eggs in hypertonic solutions and hypotonic solutions. Hypothesis: If the corn syrup is a hypertonic solution‚ then the egg’s size will shrink. If the water is a hypotonic solution‚ then the egg will swell. Materials: Styrofoam cups (2 per group) Styrofoam cups to weigh down egg (2) Balance Paper towels Vinegar (enough to cover egg) Distilled water Corn syrup Fresh eggs (2 per group) Procedure: Day
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Hydrogen Fuel Cells There are many reasons to look for new cleaner forms of energy. Fossil fuels‚ being non-renewable‚ will eventually run out. Pollution from burning fossil fuels destroys our environment. Hydrogen fuel cells could be used many places where fossil fuels are currently being used. Using hydrogen as a form of energy can not only reduce our dependence on imported oil‚ but also benefit the environment by reducing emissions of greenhouse gases and pollutants that affect our air quality
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central and critical role in the cell as the genetic information in which all the information required to duplicate and maintain the organism. Today‚ Scientists can analyze DNA from minute samples of blood‚ hair roots and saliva‚ but before they can analyze DNA‚ scientists must be able to extract it. The process of DNA extraction is the first step for many laboratory procedures. Scientists must be able to isolate the DNA from the other unwanted substances of the cell gently enough so that the DNA is
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concentrations of propanol‚ ethanol‚ methanol‚ NaCL‚ and sodium dodecyl sulfate henceforth known as SDS on Beta vulgaris to ultimately distinguish the ability of each solution to permeate the membrane of the Beta vulgaris. • Beta vulgaris contains a beta cyanin which is a water-soluble red-pigment‚ which remains in a healthy vacuole surrounded by the tonoplast membrane. When we damage the tonoplast membrane and thus disrupt the vacuole‚ this red pigment spilled out into the solution and the solution turns
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EXPERIMENT NO. 1 AIM: To perform isolation of the genomic DNA from the bacterial cell. REQUIREMENTS: Biological: Bacterial culture (DH5α) Chemical: Solution 1 - 10ml • Glucose (50mM) - 500μl • Tris-Cl (pH 8.0‚ 25mM) - 250μl • EDTA (pH 8.0‚ 10mM) - 200μ Solution 2 • SDS (1%) Phenol: chloroform: isoamylalcohol (25:24:1)‚ Absolute ethanol‚ 70% ethanol‚ Sterile distilled water Apparatus: Micropipettes‚ conical flask‚ measuring
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Investigating the effect of temperature on plant cell membranes The purpose of this activity is: • to practise experimental and investigative skills • to investigate the effect of temperature on cell membrane structures Procedure SAFETY: Always carry scalpels clasped to a tile and with the tip pointing away from you. Beetroot cells contain pigments called betalains that give the tissue its dark purple-red colour. The pigment is contained in the cell vacuole. Investigation a. Collect
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Title: Ms. K Cell Membrane and Homeostasis Experiment Objective(s): The reason for this experiment is to see how starch and iodine affect each other and how a plastic bag works similar to a membrane in certain situations. Introduction: I know prior to doing this experiment that iodine mixed with starch creates a dark color and that most objects‚ organic and inorganic‚ naturally experience isotonic reactions. Hypothesis: I think that the potato will absorb more starch than the sweet potato and
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General Steps in Biochemical Separation 2 Separation of Macromolecules Chromatography‚ precipitation Electrophoresis‚ ultracentrifugation 3 Densities of biological material Material Density (g/cm3) Microbial cells 1.05 - 1.15 Mammalian cells 1.04 - 1.10 Organelles 1.10 - 1.60 Proteins 1.30 DNA 1.70 RNA 2.00 4 Introduction (MBM 3.1) Principles of centrifugation A centrifuge is a device for separating particles from a solution according
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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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Overview: Life at the Edge The plasma membrane separates the living cell from its nonliving surroundings. This thin barrier‚ 8 nm thick‚ controls traffic into and out of the cell. Like all biological membranes‚ the plasma membrane is selectively permeable‚ allowing some substances to cross more easily than others. Concept 7.1 Cellular membranes are fluid mosaics of lipids and proteins The main macromolecules in membranes are lipids and proteins‚ but carbohydrates are also important. The
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