Direction and concentration gradients Bradley Benton ABSTRACT In this experiment‚ we will investigate the effect of solute concentration on osmosis. A semi‐permeable membrane (dialysis tubing) and sucrose will create an osmotic environment similar to that of a cell. Using different concentrations of sucrose (which is unable to cross the membrane) will allow us to examine the net movement of water across the membrane. INTRODUCTION A major determinant of diffusion in a biological system is membrane
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completely unaware of the horrific events about to unfold that would overshadow their city still today. The citizens of Dachau were oblivious that their city was going to become the origin of concentration camps and of the Holocaust‚ the mass murder committed by the Nazi s in World War II. Dachau Concentration Camp‚ which would soon be placed on the edge of their community‚ would serve as a model for all Nazi extermination camps. This perfect prototype of a Nazi killing machine has come to represent
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Biomes Comparison Essay Ecologists group earth’s diverse environments into biomes. A biome is a complex of terrestrial communities that develops a large area and is characterized by certain soil climate conditions and particular assemblages of plants and animals. Not all species live in every biome they vary in their adaptations to different conditions. An adaptation is an inherited characteristic that increases an organism’s ability to survive and reproduce. These sorts of variations in plants
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Name ____________________________ Date ____________ THE EFFECT OF CONCENTRATION ON THE RATE OF DIFFUSION PURPOSE: This experiment will explore the concentration gradient by measuring the rate of diffusion in a number of theoretical cells. The objectives for this lab are: (1) To define concentration gradient‚ (2) To explain experimental data concerning different concentration gradients‚ (3) To complete a data table and prepare a graph to illustrate the data‚ and (4) To apply information from
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Experiment 2: Estimation of protein concentration Introduction Protein assays are designed to measure the total protein in a solution. Protein assays are quantitative if the protein to be assayed is available in sufficient quantity such that one is able to use it to create a standard curve. If this cannot be achieved‚ then a standard protein‚ such as albumin‚ may be used for a standard curve with the understanding that the results on the unknown protein are semi-quantitative. Since most proteins
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An investigation to see how much oxygen is given off when different concentrations of catalase are added with hydrogen peroxide. Aim: To see if changing the concentration of catalase (found in celery) with hydrogen peroxide affects the amount of oxygen given of. Background Information: (Hydrogen peroxide - H2O2 1/2O2+H2O) Enzymes: Hundreds of chemical reactions happen simultaneously inside living cells and it’s the job of enzymes to control and regulate the various metabolic
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a.1 Eukaryotic Cell vs Prokaryotic Cell All cells can be classfied into prokaryotes and eukaryotes. Prokaryotes were the only form of life on Earth for millions of years until more complicated eukaryotic cells came into being through the process of evolution. Comparison chart All attributes Differences Similarities | Eukaryotic Cell | Prokaryotic Cell | Nucleus: | Present | Absent | Number of chromosomes: | More than one | One--but not true chromosome: Plasmids | Cell Type: | Multicellular
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correct. High Power should show only a couple of cells that take up most of the viewing field. The micoscope is designed to view the slide at different spots‚ so not all drawings will look like this one. Images were snipped from the virtual microscope’s flash animation. Scanning (4) | Low (10) | High (40) | 3. Go to google and type "cheek cells" into the search box. Click on "images" to see all the images google has found on the web showing cheek cells (there should be hundreds). What do all of
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Auschwitz Concentration Camp Imagine that you were a 14 year old Jewish girl riding with your family and hundreds of other Jews and Gypsies packed into one tiny railroad car. You stop at an unfamiliar place were a man is screaming at you to get out. You have to watch your step getting out of the railcar because there are already dead people on the floor who passed on the trip here. Once you are out you are separated from your family‚ woman on one side men on the other. Kids are franticly
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Cells are considered the basic units of life in part because they come in discrete and easily recognizable packages. That’s because all cells are surrounded by a structure called the cell membrane. The cell is the very smallest unit of living matter. All living things including plants and animals are made up of cells. Cells are made of atoms‚ which are the smallest units of matter. There are many different kinds of cells. The two kinds you are most likely to be familiar with are animal and plant
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