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21 Cards in this Set

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  • Back
____ is a compound on which enzyme "works"
substrate
____ is the specific portion of the enzyme where substrate binds
active site
____ is the process that makes an inactive nezyme active.
activation
____ is any process that makes an enzyme less active or inactive
inhibition
Both the lock-and-key model and the induced-fit model emphasize the shape of the ______.
active site
The ____ of the active site is the most important.
chemistry
5 amino acids that participate in active sites
His > Cys > Asp > Arg > Glu
____ is a substance that binds to the active site of an enzyme thus preventing binding of substrate
competitve inhibitor
____ is any substnce that binds to a portion of the enzyme other than the active site and thus inhibits the activity of the enzyme.
noncompetitive inhibitor
The induced-fit model comparing active site to a glove and substrate to a hand explains _____
competitive inhibition
_____ is the binding of a regulator to a site other than the active site changing the shape of the the active site.
Allosteric effect
______ is an enzyme-regulation process where the product of a series of enzyme-catalyzed reactions inhibits an earlier reaction in a sequence.
feedback control
High concentration of ____ can be used to regulate feedback.
substrate
Nerve gas, cyanide, and arsenic are ex. of ____ inhibitors.
irreversible
Nerve gas contains lots of ___ groups.
phosphate
2 things nerve gas affects
trysin and chymotrypsin
What irreversible inhibitor binds to metals?
cyanide
_____ is an irreversible inhibitor that substitutes for phosphate.
arsenic
3 changes that occur to enzyme modification from inactive to active
1) hydrolysis of N-terminal end of 6 AA chain
2) changes 3-D structure
3) exposes active site
_____ is an enzyme in the inactive form.
zymogen
____ is a reversible enzyme that occurs in multiple forms; each catalyzes the same reaction
lsoenzyme