Enzymes and Digestion Flashcards
Not all enzymes work inside cells. Give an example of where they don’t.
In the stomach because enzymes used in digestion are produced in the cells and then released into the stomach to be mixed with food
What do digestive enzymes do?
Break down large insoluble molecules into smaller soluble ones
Why do digestive enzymes break large molecules into smaller ones?
Because big molecules are too big to pass through the walls of the digestive system
Where are digestive enzymes made?
In glands
What are three examples of big molecules that are too big to pass through the walls of the digestive system?
Starch, proteins and fats
What are four examples of smaller molecules that can pass easily through the walls of the digestive system?
Sugars, amino acids, glycerol and fatty acids
What are the three digestive enzymes you need to know?
Amylase (a Carbohydrase), Protease and Lipase
Where is amylase made?
The salivary glands, pancreas and small intestine
What does amylase do?
Catalyses the digestion of starch into sugars
Where does amylase catalyse its things?
In the mouth and small intestine
Where is protease made?
In the stomach, the pancreas and the small intestine
What does protease do?
Catalyses the breakdown of proteins into amino acids
Where does protease catalyse its things?
In the stomach and small intestine
What is protease called in the stomach?
Pepsin
Where else does protease catalyse things apart from the stomach?
The small intestine
Where is lipase made?
In the pancreas and small intestine
What does lipase do?
Catalyses the breakdown of lipids (fats and oils) into fatty acids and glycerol
