The properties of Explain why enzymes are hydrogen peroxide. Use the and boiled liver on or small beakers and enzymes. specific and are denatured observations to lead into the hydrogen peroxide. goggles. by high temperatures and properties of enzymes. The lock and key Explore how the rate of extremes of pH. theory and collision Watch a video clip to help to a reaction can be theory can be used to Use the lock and key theory describe the action of catalase. measured by measuring Demo: living tissue, explain enzyme action. and collision theory to the volume of gas given Watch computer simulations to hydrogen peroxide, explain enzyme action. off in a given time. help make notes and explain flask, delivery tube, the properties of enzymes. Calculate the rate using gas syringe, cylinder data obtained. Make models or cut-outs to and trough, timer. demonstrate the of the Discuss how the active site of an enzyme and equipment could be the shape of the substrate(s). adapted to investigate the effect of a factor on Demo: how the rate of the the rate of the reaction. catalase reaction can be measured using a gas syringe Make predictions and or inverted cylinder of water identify variables. and timer to prepare for the Required practical next lesson. 4.2.2.1 Required practical: Carry out a safe, controlled 1.5 Required practical. Required practical: investigation to measure the Carry out a safe, Investigate the effect rate of the catalase under controlled investigation of pH on the rate of different conditions. to measure the rate of reaction of amylase the catalase reaction enzyme. Draw a diagram of the under different apparatus and write a Students should use a conditions. Draw a method. Identify variables. continuous sampling diagram of the Present and analyse the
The properties of enzymes. The lock and key theory and collision theory can be used to explain enzyme action. Explain why enzymes are specific and are denatured by high temperatures and extremes of pH. Use the lock and key theory and collision theory to explain enzyme action. hydrogen peroxide. Use the observations to lead into the properties of enzymes. Watch a video clip to help to describe the action of catalase. Watch computer simulations to help make notes and explain the properties of enzymes. Make models or cut-outs to demonstrate the of the active site of an enzyme and the shape of the substrate(s). Demo: how the rate of the catalase reaction can be measured using a gas syringe or inverted cylinder of water and timer to prepare for the Required practical next lesson. and boiled liver on hydrogen peroxide. Explore how the rate of a reaction can be measured by measuring the volume of gas given off in a given time. Calculate the rate using data obtained. Discuss how the equipment could be adapted to investigate the effect of a factor on the rate of the reaction. Make predictions and identify variables. or small beakers and goggles. Demo: living tissue, hydrogen peroxide, flask, delivery tube, gas syringe, cylinder and trough, timer. 4.2.2.1 Required practical: Investigate the effect of pH on the rate of reaction of amylase enzyme. Students should use a continuous sampling Carry out a safe, controlled investigation to measure the rate of the catalase under different conditions. Draw a diagram of the apparatus and write a method. Identify variables. Present and analyse the 1.5 Required practical. Required practical: Carry out a safe, controlled investigation to measure the rate of the catalase reaction under different conditions. Draw a diagram of the
AQA-8464-SOW-ORG.DOCX