week 4 c

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six classes of enzymes

oxidoreductase, transferases, hydrolases, lyases, ligases, isomerases
hydrolases

ACP, ALP, AMY (amylase)
oxidoreductase

LD, g-6-pdh
transferases

AST, ALT, CK, GGT
Enzymes catalaze physiologic reactions by

lowering the activation energy that substrate must reach
One major influence on enzymatic reactions

substrate concentrations
With the amount of enzyme exceeding the amount of substrate reaction rate

increases steadily as substrate added
first order kinetics

reaction rate is directly proportional to substrate concentration
when substrate concentration is high enough to saturate all enzymes

Velocity reaches its max
zero order kinetics

dependent only on enzyme concentration