This demonstration illustrates the importance of enzymes in the human body. Enzymes catalyze many important chemical reactions in the body. This demonstration is a visual example of how the enzyme catalase, which is present in all cells, but in highest concentrations in the liver, breaks down hydrogen peroxide into water and oxygen gas. Hydrogen peroxide, which is a potentially damaging oxidizing agent, is a by-product of certain cellular reactions. It must be broken down quickly because it could damage and destroy cells.
Categories: Teacher Demonstration
When you gaze up in the night sky some stars will be very bright while other stars are barely visible to the unaided eye. With the aid of binoculars you may be able to observe different colours in... read more
In this demo, a polyethylene strip is charged by rubbing with wool. The strip is then used to test what happens to the flow of charge when the strip is placed in contact with a conductor (iron nail)... read more