1、Macromolecules hydrolysis •Exoenzymes diastase（amylase）、protease、 lipase • endoenzymes • Starch hydrolysis Some bacteria are capable of using starch as a source of carbohydrate but in order to do this, they must first hydrolyze or break down the starch so it may enter the cell. The bacterium secretes an exoenzyme which hydrolyzes the starch by breaking the bonds between the glucose molecules. This enzyme is called a diastase （amylase）.1、Macromolecules hydrolysis •Exoenzymes diastase（amylase）、protease、 lipase • endoenzymes • Starch hydrolysis Some bacteria are capable of using starch as a source of carbohydrate but in order to do this, they must first hydrolyze or break down the starch so it may enter the cell. The bacterium secretes an exoenzyme which hydrolyzes the starch by breaking the bonds between the glucose molecules. This enzyme is called a diastase （amylase）