Preview

Biology: Experiment- The Effect of Temperature on the Enzyme Rennin

Good Essays
Open Document
Open Document
1895 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Biology: Experiment- The Effect of Temperature on the Enzyme Rennin
Aim: The aim of the experiment is to test the effect temperature has on the activity of the enzyme rennin.

Hypothesis: I believe the rate of reaction will speed up as the temperature increases until it reaches about 37oC, which is the body temperature, where it will begin to slow down and stop reacting. I believe this will occur because enzymes have a temperature range at which they work best in and once the temperature goes out of this range the enzyme will stop working.

Introduction:Enzymes are made up of proteins which are produced within living cells and act as catalysts which speed up chemical reactions. They are made up of long chains of amino acids containing carbon, hydrogen, oxygen and nitrogen. Enzymes are structured to be unique to a few but often only one substrate therefore being specific to one type of reaction. A substrate is the molecule that an enzyme acts upon. An enzyme has an active site which is shaped for a specific shaped substrate. The substrate and the enzyme bind together at the active site and form an enzyme-substrate complex. This then breaks down to form the products, releasing the enzyme. During the reaction the enzyme does not undergo change.

Most organisms can only survive within certain temperature ranges. For reactions to occur substances must collide with the correct orientation and necessary amount of energy, called the activation energy. The role of the enzyme is to lower the activation energy which therefore allows chemical reactions to take place inside organisms without the temperature having to be so high as well as speeding up the reaction. Every enzyme has a certain temperature range where it can work most efficiently with an optimal temperature at about 37.5 0C for most enzymes within the body. Once the temperature goes above the enzymes temperature range, the enzyme will begin to denature as intermolecular and intramolecular bonds begin to break as the kinetic energy intensifies as the temperature increases. Once the

You May Also Find These Documents Helpful

  • Better Essays

    GRT1 Task 4

    • 964 Words
    • 4 Pages

    Enzymes are proteins that act as catalysts during a biochemical process. Catalysts are non-changing enzymes that can increase or decrease activation energy to accelerate or slow down a biochemical reaction without using additional energy.…

    • 964 Words
    • 4 Pages
    Better Essays
  • Good Essays

    The prediction for the effects of temperature on the enzyme activity was that the reaction’s rate would increase as the temperature increased, until they go over the optimum temperature where the enzymes denature and the reaction’s rate quickly drops to zero. At 5 degree C the rate is 0.00059mole PNP/min. This then increases to 0.01031mmoles PNP/min at a temperature of 50 degree C. The rate then drops drastically to -0.00215moles PNP/min. This point is where the enzymes have been denatured and have no activity, shown as the last point on the fig 8 and 9, do not fit on the graph. The optimum temperature was about 47 degree C. The core body temperature is only about 37 degree C and thus these enzymes are operating below their optimum temperature.…

    • 521 Words
    • 3 Pages
    Good Essays
  • Good Essays

    4- All enzymes and other molecules function within a limited temperature range. Unless the body temperature is maintained at these optimal conditions, the rate of enzyme-catalysed reactions decreases and the organism will not function properly.…

    • 1141 Words
    • 5 Pages
    Good Essays
  • Satisfactory Essays

    Enzyme Lab

    • 431 Words
    • 2 Pages

    The rate of enzyme activity is highest when the temperature is the highest and lowest when the temperature is lowest. The temperature causes the enzymes to speed up and produce more product when heated and slows down when cooled. This is seen in the data gathered during the temperature part of the lab.…

    • 431 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Enzymes are proteins which serve to reduce the activation energy required for biological reactions (Russell and others 2010). This allows biologically important chemical reactions to occur rapidly enough to allow cells to carry out their life processes (Russell and others 2010). Enzymes are made of one or more polypeptide strands, which individually or as an associated complex take on a three-dimensional shape. When properly associated, these shapes form the active site and other supporting structures that allow enzymes to be effective catalysts (Nelson and Cox 2005).…

    • 1387 Words
    • 6 Pages
    Good Essays
  • Good Essays

    If the temperature rises above 37∙C, enzymes stop working and become denatured. This occurs as part of the enzyme called the active site is changed by a rise in temperature and so, certain molecules can no longer bind to the enzyme, and the reaction cannot take place.…

    • 468 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Enzymes function most efficiently at the temperature of a typical cell, which is 37 degrees Celsius. Increases or decreases in temperature can significantly lower the reaction rate. What does this suggest about the…

    • 396 Words
    • 2 Pages
    Good Essays
  • Better Essays

    The temperature range over which enzymes show activity is limited between the melting point (0oC) and boiling point (100oC) of water. If a temperature is too low, there can be no noticeable reaction rate since the enzyme is operating at a temperature far below its optimum. If the temperature at which the enzyme is operating at is well above 100oC, then thermal deactivation can…

    • 1410 Words
    • 6 Pages
    Better Essays
  • Satisfactory Essays

    Enzyme Lab

    • 353 Words
    • 2 Pages

    This lab relates to enzymes, proteins, and substrates; that we learned in class. The union of the enzyme and the substrate is called the enzyme-substrate complex. The make-up of an enzyme is proteins and made up of chains and amino acids. Enzymes are considered to be organic catalysts, they speed up chemical reactions that might otherwise take too long to occur and be of use in the body. They also allow reactions to occur in regions of the body that are unfavorable because of the level of pH or the lack of heat.…

    • 353 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    The enzyme activity will increase due to an increase in velocity and kinetic energy in which the rate of collisions increases. If the change in temperature increase higher than body temperature the rate of the reaction will decrease since the heat will denature the enzyme. As the temperature decreases this will cause the reaction to slow down due to the lack of collisions (Somero, 1969). Like temperature enzymes are affected by changes in pH. The changes in pH can affect the shape of the enzyme due to the breaking of ionic bonds that are used to hold the three-dimensional structure of the enzyme in…

    • 472 Words
    • 2 Pages
    Good Essays
  • Good Essays

    The purpose of this review paper is to discuss the effect of temperature on enzyme- catalyzed reactions. This is relevant because many diseases can be diagnosed and controlled by the processes of enzyme activity (Worthington 2015). If more information is not found about enzyme activity and how it is affected, many diseases may go undiagnosed and uncontrolled.…

    • 1009 Words
    • 5 Pages
    Good Essays
  • Good Essays

    Temperature affects enzymes in two different ways: by increasing the kinetic motion of molecules, changing the rate of collisions between them and the hydrogen bonds it’s 3D structure(D. Fraser, 55). There is a specific temperature for every enzyme where activity is maximized, and also where an enzyme becomes denatured. An enzyme becomes denatured when it is heated at extreme temperature; the excessive kinetic movement of the amino acid begins to break the hydrogen bonds holding its 3D structure together, typically around 70℃. Another factor that can affect enzyme activity is substrate concentration.…

    • 499 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Ib Biology Enzymes Ia

    • 1408 Words
    • 6 Pages

    Enzymes are globular proteins, they are responsible for most of the chemical activities of a living organism. They act as catalysts, substances that affects the reaction of other substances without being destroyed or altered during the process. They are extremely efficient in the body system of living organisms, one enzyme may catalyse over a thousand chemical reactions every second. But there are certain conditions that need to be fulfilled in order for the enzymes to work. Temperature of the environment must be correct for each enzyme because different enzymes will have different temperature ranges in which they can live. pH levels in the environment must also be correct because if the environment around the enzyme is too basic or acidic, the enzyme will quickly denature.…

    • 1408 Words
    • 6 Pages
    Good Essays
  • Better Essays

    All About Enzymes

    • 2441 Words
    • 10 Pages

    They work best when they are at optimum temperature this is why homeostasis is important to keep our body temperature at a constant 37c as the temperature increases, so does the rate of the chemical reaction. This is because heat energy causes more collisions, with more energy between the enzyme molecules and other molecules. However when the temperature of the reaction is above optimum temperature of the enzyme, the heat energy causes the active site (which is made up of amino acids) to change shape thereby not allowing the substrate molecule to attach this process and cannot…

    • 2441 Words
    • 10 Pages
    Better Essays
  • Good Essays

    Enzymes are biological catalysts which speed up chemical reactions by lowering the activation energy, the energy required to break bonds. [1] Enzymes are also affected by factors such as temperature, cofactors, activators, inhibitors, and pH.…

    • 563 Words
    • 3 Pages
    Good Essays