Flashcards in Enzymes and Digestion Deck (23)
What do bile salts do to lipids?
What does emulsification achieve?
A greater surface area for the reaction with lipases
Lipid + bile salt =
Emulsified lipid + lipase =
Fatty acids and glycerol
Name the enzyme used to hydrolyse lipids.
Where are lipases made?
What does lipase do?
Hydrolyse the ester bond found in triglycerides to form fatty acids and monoglycerides
What are proteins hydrolysed by?
What are the three types of peptidases?
Endopeptidases, exopeptidases and dipeptidases
What does an endopeptidase do?
Hydrolyses the peptide bonds between amino acids in the central region of a protein molecule, forming a series of peptide molecules.
What does an exopeptidase do?
Hydrolyses the peptide bonds on the terminal amino acids of the peptide molecules formed by endopeptidases. In this way they progressively release dipeptides and single amino acids
What do dipeptidases do?
Dipeptidases hydrolyse the bond between the two amino acids of a dipeptide. Dipeptide said are membrane - bound (part of the cell-surface membrane of epithelial cells lining ileum)
What is linear starch made of?
What is branched starch made of?
Name the enzyme that hydrolyses starch.
Name the bond hydrolysed by amylase.
What do the acidic conditions in the stomach do to the amylase
What does starch mix with in the intestine?
Pancreatic juice, which contains pancreatic amylase. This continues the hydrolysis of of any remaining starch to maltose.
How is maltose broken down?
Maltose is broken down by maltose which is part of the cell surface membrane of epithelial cells that line the ileum (membrane bound disaccharide). Maltose is broken down by maltose into alpha glucose
Where does lipid digestion occur?
Only in the lumen of the small intestine
Name the bond hydrolysed by lipases.
Name the bond hydrolysed by endopeptidases.