B3 Organisation and the digestive system Flashcards
what is the food test for protein
biuret solution, a positive result is it turning purple and a negative result is it staying blue
what is the food test for lipids (fats)
ethanol, a positive result is a milky white suspension layer and a negative result is a clear solution
what is the food test for starch
iodine solution, a positive result is it turning blue/black and a negative result is it staying orange.
what is the food test for glucose
benedicts solution and heat, a positive result is it turning red and a negative result is it staying blue
what enzyme breaks down starch
amylase (a carbohydrase)
what enzyme breaks down proteins
pepsin (a protease)
what enzyme breaks down lipids
lipases
what does protein break down into
amino acids
what do lipids break down into
fatty acids and glycerol
what does starch break down into
simple sugars (glucose)
where is pepsin produced
stomach, pancreas and small intestine
where is amylase produced
salivary glands, pancreas and small intestine
where is lipases produced
pancreas and small intestine
what’s the optimum ph for pepsin, amylase and lipases
pepsin- 3
amylase- 7
lipases- 8
whats an enzyme
a protein which is a biological catalyst that speeds up a chemical reaction
