Transcript Document
Catalase
Sources - plant tissues e.g. potato
tuber, apple
animal tissues e.g. liver,
muscle
hydrogen peroxide ---------- water +
oxygen
Speed up the break down of hydrogen
peroxide to water and oxgen
Importance of catalase
Hydrogen peroxide is a toxic metabolic
by-product produced in metabolic
reactions. It is harmful when
accumulated to high concentration.
Catalase can speed up the breakdown
of hydrogen peroxide to water and
oxygen. So it help the removal of toxic
hydrogen peroxide.
Amylase
Source – saliva, germinating seeds /
seedlings, yeast culture
Starch + water --------------- maltose
Amylase speeds up the hydrolysis /
digestion of starch to maltose.
Importance – to digest starch to maltose
Invertase (sucrase)
Source – yeasts, bacteria, intestinal
juice
Sucrose + water - fructose + glucose
Invertase speeds up the hydrolysis of sucrose
to fructose and glucose.
Importance – It helps the digestion of
sucrose to simple sugar
Pepsin
Source – gastric juice
Protein + water ----- polypeptides
Pepsin speeds up the hydrolysis of
protein to peptides.
Importance – It helps the digestion of
protein to polypeptides
Trypsin
Source – pancreatic juice
polypeptide + water -- peptides
Trypsin speeds up the hydrolysis of
polypeptide to peptides
Importance – It helps the digestion of
polypeptide to peptides
maltase
Source – intestinal juice
maltose + water glucose
Maltose speeds up the hydrolysis of
maltose to glucose
Importance – It helps the digestion of
maltose to glucose
Urease
Bacteria, liver
ammonia + carbon --- urea
dioxide
Urea speeds up the formation of urea
from ammonia and carbon dioxide.
Urease helps the formation of urea in
deamination of excess amino acids.