The goldfish (Carassius auratus) is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is one of the most commonly kept aquarium fish. A relatively small member of the carp family (which also includes the Prussian carp and the crucian carp), the goldfish is native to east Asia. It was first selectively bred in China more than a thousand years ago, and several distinct breeds have since been developed. Goldfish breeds vary greatly in size, body shape, fin configuration and colouration (various combinations of white, yellow, orange, red, brown, and black are known).
Mechanical digestion is the physical breaking down of food particles into smaller food particles to increase surface area for chemical digestion. Chemical digestion is the use of enzymes to break down polymers into monomers (through the breaking of chemical bonds)
First part of the lesson: Amylase is an enzyme that breaks starch down into sugar. Explain what an enzyme is and how it works. Introduce the tools we will use in the experiments. Go back to Cracker and introduce the idea that the enzyme that broke starch down into sugar is called amylase.An enzyme breaks down larger molecules into smaller molecules like sugars. -An enzyme is specific for its substrate: the enzyme that breaks down starch won't be able to break proteins down. -An enzyme is reusable, it doesn't get used up in the reaction, so it can perform it over and over again.