Research question What is the effect of temperature Amylase activity? Word count-1453 Background research Enzymes are biological catalysts that speed up a chemical reactions. They do this by decreasing the activation energy(the energy needed to start the reaction) of a chemical reaction. The enzyme present in our saliva is called Amylase. Amylase increases the rate of reaction by decreasing the activation energy needed to hydrolyse the starch molecules. These enzymes have a secondary and tertiary structure and this could be affected by increases and decreases in temperature beyond the optimum temperature of the enzyme to work in. Mostly enzymes are highly affected any changes in temperature beyond the enzymes optimum. There are too …show more content…
Dependent The time taken for the bluish -black color to fade away (color of Iodine solution mix with starch solution ). The rate of enzyme reaction Minutes (min) Table 1.1 – Table shows the controlled variables in the experiment variables Units Measures of controlled variables. Controlled Concentration of amylase Amount of amylase/starch Ph of the amylase/starch The concentration of the Amylase was kept at 1% at at times throughout the experiment. 5cm3 of both will be used in each reaction. pH of the Amylase/starch will be kept the same. Uncontrolled Environmental conditions Atmospheric conditions The controlled variable Concentration of amylase was kept under control by measuring the amount of amylase used and also it was made sure the percentage of amylase used was 1%. The Amount of amylase/starch used were kept to 5cm3 at all times. Materials needed Beakers Bunsen burner Test tube Thermometer Stopwatch Test plate Glass rod Starch Amylase solution Water bath Iodine solution. Test tube holder Labels Marker Procedure First 5 test tubes were taken and labeled with numbers from 1 to …show more content…
5 water bath were set up each to10 °C. (5 were used do the experiment faster) 5 cm3 of starch solution were added into the 5 test tubes that were labeled test tubes. Then 5 cm3 of amylase enzyme was added into the other 5 test tubes that were labeled. Put one of the starch solution test tube (preferably the one labeled 1) and one of the test tube containing amylase into the water bath (10 °C). Do the same for the other test tubes. Let the test tubes not be disturbed for about 3- 4 mins. Then add the Amylase solution to the Starch solution and start the stopwatch (immediately). After every 1 min take one drop from the test tubes and place then in the test plate that were
Because of the fact that reactions are catalyzed by enzymes when they randomly collide with substrate molecules, increasing the temperature would increase the reaction rate. Increasing the temperature further increases the vibrational energy of the enzyme molecules, straining the bonds that keep them together. Furthermore, when the temperature is higher, more bonds will break because of these strains, causing the active site of the enzymes to change too. Similar to pH, a change in the shape of the active site leads to the substrate not being able to fit perfectly, leading to the enzyme not being able to catalyze the reaction. Overall, an increase in temperature will cause the rate of reaction to increase initially due to the increased kinetic energy.
After record your data and determine the absolute rate of the enzyme-catalyzed reaction. Based on the data and observations the hypothesis was accepted. It was accepted because when pH were changed to a variety of levels the transmittance began to get higher reaction rates. The increased absorbance means greater amount of product and a higher reaction rate will be produced.
By completing this experiment, knowledge collected about optimal pH in enzymes will help
The 0.1% is the concentration amount. Just like temperature and pH, substrate concentration can speed the reaction only up to a certain limit. When we mixed pH 3 enzyme tube with substrate tube, we used 0.3 mL of hydrogen peroxide, but if we were to increase the amount, then the experiment would have been faster. Our
Starch solution is then placed into the test tube at a quantity of 5 mL. 5 drops of Lugol’s Iodine solution is added to the test tube. If the color changes, then it is known that starches are present in the solution. Proteins are next tested. In order to do this, 5 mL of gelatin solution is added to the test tube. 10 drops of Biuret’s reagent are added to test for protein.
Introduction: In this assignment, I will be doing two experimentations on examining the impact of temperature on the Alka-Seltzer’s response time. The first experimentation that I will be doing involves some water that is room temperature. The second experimentation that I will be doing involves some water that is very hot. If I want to be able to figure out the impact of the temperature on water, I will have to document the time it will take for the Alka-Seltzer to go into solution.
In a non-reducing sugar 3cm cubed and 10 drops of hydrochloric acid is placed in a test tube for a water bath of 5 minutes to be mixing afterwards. Biurets reagent is added to the protein solution to determine it presence. Testing for
The hirer the pH the greater the reaction. 5. Discuss in detail the general conditions necessary for affective enzyme action. Are the conditions the same for each enzyme? Why or why not?
5. Explain why denatured sucrase was used as a control. Denatured sucrase was used as a control because it was inactive compared to the active sucrase. Using it slowed
7. In this experiment, if the sucrose concentration were increased to 70 g/l would you expect sucrase activity to be significantly higher than the activity at 35 g/l. Explain your answer. No, because based on the results once it reached 30 g/l 35 g/l the results had stayed the same. There, the activity is lessening and coming to what looks like a plateau. 8.
Iodine can detect starch, so I will use it to see how much starch will be present on each treatment and this will allow me to find how amylase concentration will affect the breakdown of starch. I will put 0.5ml of potassium iodide solution of 0.0005molL-1 on each of the treatments to see how the colour of the solution will change. In theory, when potassium iodide dissolves in water, the iodine ions react with starch, which produces a blue colour [9,10]. The negatively charged iodine ions go between the spherical holes of the starch compound and alters the energy level of the molecules. This results the compound absorbing a different wavelength of light, hence changing the colour [9].
Enzymes speed up chemical reactions enabling more products to be formed within a shorter span of time. Enzymes are fragile and easily disrupted by heat or other mild treatment. Studying the effect of temperature and substrate concentration on enzyme concentration allows better understanding of optimum conditions which enzymes can function. An example of an enzyme catalyzed reaction is enzymatic hydrolysis of an artificial substrate, o-Nitrophenylgalactoside (ONPG) used in place of lactose. Upon hydrolysis by B-galactosidase, a yellow colored compound o-Nitrophenol (ONP) is formed.
Bio Chem lab Report 04 Enzyme Biochemistry Group Member: Chan Man Jeun Duncan (16002621) Law Sze Man (16000478) Introduction Enzyme is a protein base structure substance in our body. It works at a biocatalyst that will catalyzing the chemical reaction, which helps to speed up the chemical reaction. Enzyme could only function in specific shape, and the shape of enzyme is depending on the environment, therefore it is hard for an enzyme to function well in an extreme environment. The aim of this experiment is to see can the enzyme functions normally in different environment(pH, temperature and salt concentration) via using starch solution, amylase from saliva, 0.5M HCl solution, 0.5M NaOH solution and NaCl solution, and using iodine solution
H20 + 2 O2 This experiment will use 1% catalase solution and 3% hydrogen peroxide solution, both diluted into water so the reaction slows down. Temperature will be controlled in this experiment to change the reaction speed of the enzyme and the substrate, this is what the experiment is looking at. The effect of the temperature will be determined by how much gas is released in two minutes, which will change the pressure inside the test tube and will be measured by a gas
Along with being found in plants, they are also present in liver cells, kidney cells, leukocytes and erythrocytes. For the concentration of enzyme experiment, the hypothesis was if the concentration of an enzyme increases, then the enzyme activity will increase as well. The hypothesis was proven to be true, because there are more enzymes to react with substrates. For the enzyme—factors affecting, the hypothesis concluded was if the temperature increases, than the enzyme activity will increase. This however was proven wrong, because enzymes become unstable at higher temperatures.