organisation - digestive enzymes Flashcards
effect of enzymes on chemical reactions
act as a catalyst
what are enzymes?
large protein molecules that have an active site
what is the active site?
what the substrate binds to. it fits perfectly (molecule enzyme breaks down)
what happens if substrate does not fit active site?
enzyme cannot break down the substance
enzymes are ______. the substrate must ________ to the active site ( the __________ theory)
specific
fit perfectly
lock and key
where are proteases found in digestive system?
stomach, small intestine, pancreas
what are proteins?
long chains of chemicals called amino acids
what happens when we digest proteins?
protease enzymes convert protein back into amino acids which are absorbed by the blood
what happens when amino acids are absorbed by body cells?
joined together in different order to make human proteins
what does starch contain?
chain of glucose molecules
what is carbohydrates broken down by? what is starch broken down by + produce?
carbohydrates
starch= amylase producing simple sugars
where is amylase produced?
saliva and pancreatic fluid
what does a lipid molecule consist of?
molecule of glycerol attached to the three molecules of fatty acids
what is lipids digested by?
lipase producing glycerol and fatty acids
where is lipase found?
pancreatic fluid and small intestine