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TEAS ScienceBiological catalysts

EnzymesATI TEAS 7 cheat sheet

Biological catalysts

10 key facts 4 practice questions Reviewed Oct 2026

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What They Do

Speed up reactions by lowering activation energy
They are not consumed — one enzyme works over and over
Nearly all enzymes are proteins

Specificity

Each enzyme fits one substrate — lock and key / induced fit
The binding site is the active site
Names usually end in -ase (lactase, amylase)

Conditions

Each has an optimal temperature and pH
Too hot or wrong pH → denatured, shape lost, function lost
Pepsin works at acidic stomach pH; most others near neutral

Control

Inhibitors block the active site; cofactors help it work

Key takeaway

Biological catalysts

Before you read

Test yourself first: 4 questions

Question 1 of 4

Bile helps break large fat droplets into smaller ones, a process called:

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