A level Digestion

Where produces bile

• pancreas

• stomach

• liver

• small intestine

Where produces amylase

• the mouth, stomach and small intestine

• the mouth and small intestine

• the mouth and pancreas

• the mouth and stomach

What do endopeptidases do?

• break the glycosidic bonds in the middle of polypeptides

• break the peptide bonds in the middle of polypeptides

• break the peptide bonds at the ends of polypeptides

• break the ester bonds at the ends of polypeptides

What will break maltose to two alpha glucose molecules?

• membrane bound disaccharidases

• membrane bound dipeptidases

• amylase

• proteases

What will lipase break down lipids to?

• glycerol and three fatty acids

• monoglyceride and two fatty acids

• diglyceride and one fatty acid

• it doesn't break down the lipids, it emulsifies them to smaller droplets

What will the optimum pH of endopeptidases likely be?

• 3

• 6

• 7

• 9

Which organ produces the most enzymes for digestion?

• mouth

• stomach

• small intestine

• pancreas

What is the purpose of mineral salts in the mouth?

• To neutralise acidic food

• To increase the pH of the mouth

• To maintain the optimum pH for amylase

• To reduce the pH of the mouth

Why can diabetics not take insulin as a tablet?

What does bile do?

• emulsifies proteins, ensuring there s a larger surface area for proteases to work

• emulsifies fats, ensuring there is a larger surface area for lipases

• emulsifies complex carbs, ensuring there is a larger surface area for carbohydrases to work