2.29 understand the role of digestive enzymes, to include the digestion of starch to glucose by amylase and maltase, the digestion of proteins to amino acids by proteases and the digestion of lipids to fatty acids and glycerol by lipase

Starch, proteins and fats are big molecules that are too big to pass through the walls of the digestive system (they're also insoluble). Sugars, amino acids, glycerol and fatty acids are much smaller molecules. They're soluble and can pass easily through the walls of the digestive system.

Digestive enzymes break down the big molecules into the smaller ones.

Starch to glucose by amylase and maltase
- Amylase converts starch into maltose
- Maltase converts maltose into glucose

Proteins to amino acids by proteases
- Proteases convert proteins into amino acids

Digestion of lipids to fatty acids and glycerol by lipases
- Lipases convert lipids into glycerol and fatty acids