An Investigation to See How Much Oxygen Is Given off When Different Concentrations of Catalase Are Added with Hydrogen Peroxide.

An investigation to see how much oxygen is given off when different concentrations of catalase are added with hydrogen peroxide.

Aim: To see if changing the concentration of catalase (found in celery) with hydrogen peroxide affects the amount of oxygen given of.

Background Information: (Hydrogen peroxide - H2O2 1/2O2+H2O)

Enzymes:

Hundreds of chemical reactions happen simultaneously inside living cells and it's the job of enzymes to control and regulate the various metabolic activities. Enzymes are biochemical catalysts, which speed up reactions that would otherwise be too slow to be of any use to an organism. They control cell metabolism by regulating how and when reactions occur. Enzymes are globular proteins; they have complex structures in which the polypeptides of which they are composed show tertiary and often quaternary folding. The three dimensional shape of the protein is vital to its functioning. If altered, they will no longer be able to bind to the substrate (the molecule taking part in the reaction). Their shape is held in place by hydrogen bonds and ionic forces; these can be altered by changes in pH and temperature.

In general enzymes;

1. Are specific (only catalyse