... The catalase is an enzyme, enzymes are catalysts which control the speeds of chemical reactions in cells, which lower the activation energy needed for particles to react, so that they will react more easily and are sensitive to changes in temperature. The increase in temperature gives more ... level is. Evidence To get a suitable range and a meaningful set of results I am using six different temperatures and I am taking three different readings for every temperature were the potato and the catalase are in the boiling tube, and finding the mean average. Accuracy To ensure maximum accurac...

• Word Count: 2395
• Approx Pages: 10
• Grade Level: High School

... brings out any anomalies and any inaccurate readings. Equipment: Thermometer, Stopwatch, Conical flask, Bunsen burner, Tripod stand, Measuring cylinder, matches, goggles, Paper marked with X. Method: I will measure out 10ml of Sodium thiosulphate and 10ml of hydrochloric acid. I will then heat the Sodium thiosulpate to 30 degrees then mix with Hydrochloric acid and time using a stopwatch the rate ... of formation of a product. I used Sodium Thiosulphate to react with hydrochloric acid. This reaction produced Sodium Chloride, Sulphur, Sulphur Dioxide and Water. Collisions between particl...

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• Grade Level: High School

... of bicarbonate ions (HCO3 ) from bicarbonates present in water. All green plants utilize the carbon dioxide from the atmosphere, during the daytime for photosynthesis. In plants, both photosynthesis and respiration continue alternatively during day and night, but during day time, the amount of carbon dioxide consumed ... intensity of light is low, so the amount of carbon dioxide absorbed is nearly equal to that released. Water is an important raw material for photosynthesis. During drought conditions, the photosynthesis rate decreases. Also closing of stomata, owing to less water content...

• Word Count: 1748
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• Grade Level: High School

... pH, and concentration of the yeast or hydrogen peroxide. The yeast acted as the enzyme, which produces catalase needed for our desired reaction with the hydrogen peroxide. What had to be wanted to measure was how well it reacted when the variables were changed. First off, the class needed to find a way ... told us that the reaction would give off oxygen gas, it was realized that the oxygen being created in the reaction could displace water to measure how much oxygen gas is being given off. Next came setting up the lab. Each group received and set up with a small glass bottle ... cylind...

• Word Count: 1449
• Approx Pages: 6
• Grade Level: High School

... ml of I2KI . Next 5 ml of the 70 ml solution was measured into one of the 11 cuvettes and placed in the spectrometer to measure the absorbance. After the initial reading, one ml of α-amylase was dropped and stirred into the to 70 ml solution. The addition ... entire experiment was repeated five more times at the following temperatures: 15°C, 30°C, 45°C, 55°C, and 60°C. Absorbencies were graphed for maximum reaction rates and optimums. The optimal temperature was 45°C with a reaction rate of 0.082 min-1 and optimal pH was 5.0 with a reaction ... Figures 3 and 4). Results After all ...

• Word Count: 1671
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• Has Bibliography
• Grade Level: High School

... source to facilitate the conversion of luciferin to its oxidized form by luciferase. We will measure the nucleotide specificity of the luciferase enzyme and how it is influenced by pH changes. We will also measure how different reagents affect the luciferin and luciferase mixture, called lantern. The production of ... no active mitochondria in the lantern, there will be no ATP produced and, therefore, no reaction. Materials and Methods Although all materials needed for this experiment could be obtained at any time, speed was of the essence. The lantern reactions would only last about two ...

• Word Count: 2028
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• Has Bibliography
• Grade Level: High School

... activity were determined in this experiment. To attain these results, potato extract (Solanum tuberosum) was mixed with catechol and exposed to different environmental conditions, then placed in a spectrophotometer to measure and record the different absorbance readings at a 420nm wavelength. It was found that catecholase activity was optimal with a pH of 6.6 and in temperatures between 27-30 ∘C. The ... ;C, 20 ∘C (room temperature), 30 ∘C, 40 ∘C, or 50 ∘C. After 5 minutes, 1mL of enzymatic potato juice was added to all tubes. After returning them to t...

• Word Count: 1327
• Approx Pages: 5
• Has Bibliography
• Grade Level: High School

... returns to its normal state. The insect can easily control this reaction with an inhibitor it naturally makes. Another contributor in this consideration is entropy. It is the measure of energy not available for work in the reaction that becomes energy moved to disorder. Entropy is simply a measurement of unusable energy in a closed thermodynamic system. An acid and base reaction ... Photochemists will experiment with chemical reactions. They will perform reactions normally only possible at high temperatures in room temperature under ultra-violet radiation. The reaction rate can be contro...

• Word Count: 1893
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• Has Bibliography
• Grade Level: High School

... returns to its normal state. The insect can easily control this reaction with an inhibitor it naturally makes. Another contributor in this consideration is entropy. It is the measure of energy not available for work in the reaction that becomes energy moved to disorder. Entropy is simply a measurement of unusable energy in a closed thermodynamic system. An acid and base reaction ... Photochemists will experiment with chemical reactions. They will perform reactions normally only possible at high temperatures in room temperature under ultra-violet radiation. The reaction rate can be contro...

• Word Count: 2203
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• Has Bibliography
• Grade Level: High School

... solution and 35 ml of buffered distilled water at pHs: 4.0, 4.5, 5.0, 5.5, 6.0 and 6.5. 0.1 ml of iodine indicator was added to 66 tubes (11 for each reaction flask). It's important to note that each pH solution sample was added to a tube immediately before placing it into a spectrophotometer. 5 ml from the ... ml of distilled water. When reaction flasks reached the appropriate temperature the enzyme was added. The basic procedure (pH procedure) was followed for each temperature, and the reactions at the different temperatures were run in succession. The absorbance however was read on the...

• Word Count: 1676
• Approx Pages: 7
• Grade Level: High School

... to be decomposed during the experiment. A cork borer - this is to extract the potato. A ruler and a knife– this will be used to measure and cut consistent quantities of potato. Two boiling tubes - this will be used to carry out the experiment which breaks down the hydrogen peroxide A Measuring ... bath. A stopwatch – this is to enable the experiment to be accurately timed The collision theory is based on the principle that for a reaction to occur the reacting molecules must collide with each other with enough energy to react. The higher the temperature the more energy ... be used a...

• Word Count: 1786
• Approx Pages: 7
• Grade Level: High School

... to be decomposed during the experiment. A cork borer - this is to extract the potato. A ruler and a knife– this will be used to measure and cut consistent quantities of potato. Two boiling tubes - this will be used to carry out the experiment which breaks down the hydrogen peroxide A Measuring ... bath. A stopwatch – this is to enable the experiment to be accurately timed The collision theory is based on the principle that for a reaction to occur the reacting molecules must collide with each other with enough energy to react. The higher the temperature the more energy ... be used a...

• Word Count: 1867
• Approx Pages: 7
• Grade Level: High School

... briefly outlines four commercial uses of enzymes and how they are important to industrial processes. Affect of temperature on enzyme activity The temperature of a system is to some extent a measure of the kinetic energy of the molecules in the system. Therefore the lower the kinetic energy, the lower the temperature of the system and, similarly, the higher the kinetic ... Most enzymes work best in or around neutral pH, say between 7 and 8. However, some enzymes are needed in conditions of extreme pH, and use that pH as an optimum for activity. For instance, pepsin that is needed in the st...

• Word Count: 1976
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... , Stop Clock Method In order to research what effect the concentration has on the rate of reaction, I will be measuring the time it takes for the reaction to complete, when various different concentrations of sodium thiosulphate are used. I have found from experience that in reactions such as this, the ... mixture will go cloudy and form a white precipitate and a clear liquid, and so I will be using the turbidity of the mixed chemicals as a measure of how much they have reacted. Therefore, when the mixture becomes opaque, I can assume that the reaction is complete, and I will stop measur...

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... drop 3 drops of 1% catalase onto 3 different catalase disks. Next, one catalase disk was inserted into each of the different concentrations using tweezers. A timer was used to measure the time taken for the three catalase disks to float to the surface of the respective test tubes. Observations and times were recorded and all equipment was washed and cleaned thoroughly with water ... most important being zymase, which is found in yeast cells. These enzymes are sensitive to environmental conditions, such that when the concentration of alcohol reaches about 14%, they are deactivated. For t...

• Word Count: 2220
• Approx Pages: 9
• Has Bibliography