Digestion Of Carbohydrates Flashcards
What is digestion?
-Making large insoluble molecules into smaller soluble molecules by hydrolysing bonds in the polymers.
What is an extracellular enzyme?
-Enzymes which are secreted out of a cell to do its role
Why can prokaryotes not have extracellular enzymes?
They have no membrane bound organelles and no vesicles and they are unicellular so enzymes would be released into the environment.
What is the model answer for the digestion of carbohydrates?
-Amylase in saliva hydrolyses starch by breaking the glycosidic bond to from maltose.
-Amylase is denatured in the stomach so there is no carbohydrate digestion there.
-Pancreatic amylase is realised and further hydrolyses any starch left over.
-Maltose is hydrolysed by alpha glucose by breaking the glycosidic bond in the ileum by the enzyme maltase which is a membrane bound enzyme.
-Glucose is then absorbed by co-transport.
What does membrane-bound mean? And why is this good for digestion?
-Found in the cell membrane.
-Enzymes can easily get out of the cell membrane as there is only a short distance to travel.