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Enzymes
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Alyssa
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Cards (4)
Definition of Enzymes:
Proteins that
catalyse specfic
chemical reactions
without
themselves being
altered
Describe activation energy:
Energy needed
to
start
a
chemical reaction
Describe the meaning of the lock and key model:
An
analogy
put forward to explain the
specific action
of an
enzyme
with a
single substrate
Features of enzymes:
All enzymes are
proteins
They
speed up chemical reactions
Enzymes
not
used up in a
reaction
Reaction specific
Each enzymes works
under specific conditions
Work by
lowering energy
of the reaction
Enzymes thought to work on a
lock-key
principle
Often work in systems with
co-enzymes
and
co-factors
(enzymes&minerals)
Can be
denatured
by
heating
(stop working)