Transcript Enzymes - CNYRIC

Unit 5-3 Notes
Mr. Hefti – Pulaski Biology
Specialized
protein that regulates a
chemical reaction
 Catalysts
(speed up reactions)
 Named
for the substance upon
which they act
 Usually end with the suffix –ase

Example: Lactase works on
lactose
Enzyme
A links to Substrate B
Together they form an enzymesubstrate complex
 Action!!!
Shape
 Parts
must fit like puzzle
pieces
 Conditions need to be met for
locking…
Temperature
 Enzymes
have ideal T
 Too cold: molecules don’t
interact
 Too hot: enzymes become
denatured (shape is destroyed by
heat)
 Human enzymes  98.6 ºF (or 37
°C)
pH
 Enzymes
require acidic,
neutral or basic conditions
 Trypsin
digests
fats in the small
intestine
 Pepsin digests
proteins in the
stomach
Amount
of substrate
 Reaction rate will  as
[substrate] increases up to a
certain point