Investigation of Effect of Temp on Amylase Activity

Investigate the result of temperatures on amylase activity


Amylase is an enzyme that catalyses the breakdown of starch in to sugars. Amylases are found in almost all vegetation, animals and microorganisms. A lot of amylase occur in germinating cereals, and in the pancreatic and saliva of higher pets.


The aim of this experiment is always to find out the speed of reaction between amylase and starch in a range of different reaction temperature ranges.


As the reaction temperature of amylase solution and starch solution boost, the reaction rate of amylase and starch will increase. Following reach the optimal temperature of amylase, the response rate of amylase and starch will certainly rapidly reduce.

The lock and key unit explains my hypothesis. The majority of enzymes are very specific to get a certain substrate, the energetic site within the enzyme molecule forms a " keyhole" into which the substrate suits like a crucial, the base molecule is then broken up in to many smaller pieces. The larger reaction temp, the more kinetic energy the substrate elements will have. It means that the substances can maneuver faster and also have a greater probability to collide and respond. However , if the reaction temperatures is too large, enzyme can become denatured. Denaturation is a structural change in a protein that alters the three-dimensional shape and causes the losing of its neurological properties1. While the temperatures rises the number of active chemical progressively reduces, and the level of reaction is slowed. So there should be an optimal temperature for each and every enzyme.

Study Question

How exactly does a range of numerous reaction temp (0В°C, space temperature throughout the experiment, 40В°C, 60В°C, 80В°C) effect on the speed of reaction between amylase and starch?


Dependent variables: sufficient time00 for the disappearance of blue-black color (color of Iodine option mix with starch solution ).

Independent variables: reaction temperatures (0В°C, area temperature through the experiment, 40В°C, 60В°C, 80В°C).

Controlled parameters

Significance/effect in the event that not controlledMethod of control Volume of amylase solution in each evaluation tubeThe volume of amylase answer in each test conduit needs to be a consistent number, mainly because we do not find out if this kind of variable can affect effect. To ensure that in this way accurate, it is necessary to maintain same volume of amylase solution in each evaluation tube. So that the reaction heat will be the simply independent changing influence the required time for the disappearance of iodine color. Using same measuring cyndrical tube and go through accurately. Amount of starch solution in every single test tubeThe volume of starch solution in each evaluation tube ought to be the same. In the event not, the pace of reaction between amylase and starch will be afflicted. Some check tubes that have more starch solution than others may possibly decrease the time required to reach the reaction temp. And also, the rate of reaction between amylase and starch will be afflicted because it might take more time to completely break down starch molecules when there is more starch solution. The required time for the disappearance of blue-black color in check tubes can become inaccurate. Employing same calculating cylinder and read effectively. pH valueChange in pH can have a remarkable effect on the pace of amylase –catalyzed effect. This a result of pH is basically because the structure of a necessary protein is taken care of by numerous bonds in the three-dimensional framework of the proteins. A change of pH from your optimum values alters the bonding habits, progressively changing the shape with the molecules. In the event the molecules will be denatured, the reaction cannot happen, the result will become unreliable. pH value might be a new 3rd party variable when it is not manipulated. Using ph level test whitening strips to test the pH benefit of amylase solution and starch solution before the test. Concentration of amylase answer in every test tubeConcentration of amylase...

References: 1 ) " Biology for IB Diploma" simply by C. T. Clegg, published by Hodder Education. 3 years ago.


Ramasubbu, N.; Paloth, V.; Luo, Y.; Brayer, G. M.; Levine, Meters. J. (1996). " Framework of Man Salivary О±-Amylase at 1 . 6 Г… Resolution: Ramifications for its Position in the Oral Cavity".

Campbell, Neil, J. Reece, and L. Mitchell. Biology 5th Release. Menlo Playground, CA. Benjamin/Cummings, 1999.



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