A level biology coursework enzymes

At a temperature below the optimum, the molecules have less kinetic energy, so the rate of collisions between enzyme and substrate molecules is low, therefore less enzyme-substrate complexes are formed. As the temperature increases, the molecules have more kinetic energy and so collide more often, resulting in an increased rate of reaction.

Note: This is an A-level piece of coursework that achieved full marks. Catalase is an enzyme which is found in most living organisms. It catalyses the decomposition of hydrogen peroxide into water and oxygen. Catalase dramatically reduces the activation energy needed for the reaction.

This meant that because the enzyme concentration (catalase in yeast) was reduced, there were fewer collisions between enzyme and substrate molecules, so the rate of enzyme-substrate formations was reduced. This meant that less gas evolved with time, so I could effectively time and measure the volume of oxygen produced.

Catalase is an enzyme which is found in most living organisms. It catalyses the decomposition of hydrogen peroxide into water and oxygen. 2H 2O 2 + Catalase >>> 2H 2O + O 2. Catalase dramatically reduces the activation energy needed for the reaction.