Aim To observe and measure the effect of osmosis on the mass of potato using a starch solution. Introduction In order to measure the effect of osmosis‚ eighteen pieces of potato were cut and placed in six groups‚ each group of three pieces cut to weigh as close as possible to one another. For each potato group‚ a test tube was half filled with a starch solution varying in concentration from 0% (water) to 1%. Hypothesis Through osmosis
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Activity of the Enzyme Catalase in breaking down Hydrogen Peroxide and the effect of various factors on Enzyme Activity Introduction The enzyme catalase is present in cells in order to speed the breakdown of hydrogen peroxide (H2O2)‚ which is a toxic chemical to the human body. When hydrogen peroxide is broken down‚ the end products are Water (H2O) and Oxygen (O2). In this report‚ the reaction of catalase to hydrogen peroxide is being tested. Furthermore‚ the effects of temperature‚ concentration
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sample of the agar plate and the slide was viewed under the microscope. Once‚ the microscopic visual was captured‚ a catalase test followed. Next‚ for further data‚ MSA results were recorded‚ along with antibiotic observations of demo plates. Lastly‚ with the information gathered‚ it was identified that the unknown sample was Streptococcus salivarius. Introduction: In this lab‚ the exploration of an unknown gram positive bacteria was conducted. What is known about gram positive microorganisms
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This section analyzes and presents the results of the two trials conducted‚ including the trial in which Hydrogen peroxide(H2O2) was denatured by a cold catalase solution and the other in which the Hydrogen peroxide(H2O2) was denatured by a hot catalase solution. The experiment conducted displayed signs of experimental error as there were many situations in which the materials provided could have faulted. Theoretically speaking‚ from the inconsistent values provided for the pH levels‚ a possible
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concentrated‚ which was hard to identify the shape of the bacteria‚ while other sections were less concentrated and was easier to analyze the shape. The next step according to the result‚ will be a catalase test.
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This was conducted through four different experiments. The first tested the effect of temperature on enzyme activity. The independent variable in the first experiment was the temperature of the solution of pH 7 buffer‚ potato juice‚ and the enzyme. The independent variable for the second experiment was the pH of the phosphate buffer. The independent variable for the third experiment was the enzyme concentration of the solution‚ and finally the independent variable of the
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Osmosis Lab Conclusion The purpose of this lab is to determine whether salt affects the movement of water in the cell. Independent variable is the factor that affects the value of variables dependent to it. In osmosis lab‚ the independent variables are the potato and onions. The dependent variable is the variable whose value is measured to determine the extent of the effect of another variable to it‚ as in an experiment. In osmosis lab‚ the dependent variable is the length of the potato. The controlled
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(O2) and water (H2O) by catalyzed by catalase‚ by measuring the time taken for 10cm3 of oxygen gas to be evolved (s) at different temperatures (K) of 297.0K‚ 300.0K‚ 303.0K‚ 306.0K and 309.0K? 1: INTRODUCTION When studying the function of catalysts in reactions during the kinetics unit‚ I was eager to know more about the position of enzymes‚ which function as biological catalysts in biological systems. After doing some further research‚ I found that catalase‚ an enzyme‚ which is found in nearly
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Osmosis and Scientific Method Lab Report Abstract The purpose of the lab is to see how different size potatoes have faster water movement depending on the concentration of sucrose it was placed in. We had two sized potatoes‚ 6g and 10g‚ and placed each in three different dilutions of sucrose at 0.5M‚ 0.1M‚ and 0.05M. We also placed a 6g and 10g potato piece in water to act as a control. Based on the weight percent change over 60 minutes‚ the 6g potato piece had faster water movement than the
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The liver is the largest organ in the entire‚ normal human body. It weighs anywhere from 2.5 to 3.3 pounds. With its large size it is also a very resilient organ. Up to 3/4 of its cells can be removed before is ceases to function. It is red-brown organ roughly shaped like a cone. The liver is located in the upper right abdominal cavity immediately beneath the diaphragm. Without the liver‚ we could not survive. It serves as the body’s chemical factory and it regulates the levels of most of the main
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