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Most enzymes are made of this macromolecule


Most enzymes are ___ or ___ structures

tertiary or quaternary

Enzymes act as a ___


A catalyst is ___

something that accelerates a reaction

Enzymes ____ specific for what they catalyze


Enzymes ____ be reused


The ending found in most enyzmes is


Enzymes work by --__

weakening the bonds which lowers activation energy

Enzymes ___ activation energy for a catalyzed reaction


A substrate is __

the substance that an enzyme acts on

The active site

a restricted region of an enzyme molecule which binds to the substrate

Induced fit

a change in the shape of an enzymes active site

___ induces an enzyme to change the shape of its active site


The effect that high temperatures have on enzymes

they denature (unfold) the enzyme

pH for most enzymes


Inorganic substances that are needed for enzymes to work properly

zinc, iron, vitamins

An enzyme inhibitor can be ___ or ___

competitive or noncompetitive

Competitive inhibitors

chemicals that resemble an enzymes normal substrate and compete with it for an active site

If a competitive inhibitor blocks the active site, the ___ can not fit


Non-competitive inhibitors

inhibitors that do not enter the active site but bind to another part of the enzyme causing the enzyme to change its shape

A chemical reaction is a

process that changes, transforms one set of chemicals into another

During chemical transformation __ and __ are conserved

mass and energy


the elements or compounds that enter into a chemical reaction


the elements or compounds that are produced by a chemical reaction

Some chemical reactions ___ energy, others ___ energy

release, absorb

chemical reactions that release energy often occur


activation energy

the energy needed to get a reaction started

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