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Engineering HSC and IIT-JEE Mains an
Advance videos. hello students today we
are studying chapter biochemistry of
cell in that we are starting to topic
working of an enzyme what if I say that
for a particular substrate there is only
one enzyme present and if that substrate
is not there that enzyme won't work this
is how enzymes function.
enzymes in chemistry lab we all have
used certain chemicals and this
chemicals in chemistry labs are used to
fasten up the reaction process or to get
that end product for example when you do
titration without finop thilin that
titratation result or the pink color
change won't come similarly when you do
acid-base reactions pH change is
dependent upon any which as well as
benefit in indicator
similarly inside our systems there are
certain chemicals which are present
which are called as enzymes enzymes are
nothing but catalyst catalyst that help
us to speed the reactions inside our
body now there are various enzymes
present inside our body it could be
pepsin chips and hormones insulin and
every enzyme in our body has different
function to do and each and every enzyme
works in a certain fashion and on a
certain parameters now enzymes are
basically made up of proteins or you can
say amino acids they helped to catalyze
a specific chemical reaction depending
upon their nature and the place where
they are working for example insulin
secreted by beta sets of the pancreas
will Lupo's and help us to form energy
from glucose without the presence of
insulin glucose cannot be used
so basically insulin and glucose are
like lock and key it is a lock and key
model that is why we say for a
particular substrate that is glucose
there is only one particular enzyme
which is insulin insulin is a hormone
know basically enzymes could be anything
they can be hormones they can be
digested proteins like pepsin trypsin or
they can be growth hormones enzymes
could be anything in your body that help
us to speed up a chemical reaction now
in a reaction substrate binds to the
enzyme and
active site and substrate participates
in the reaction by binding to the design
on the active site and after the
chemical reaction what is form is called
as product now formation of this product
takes place or in certain steps so let
us see what enzymes are
enzymes they are protein molecules
capable of catalyzing specific chemical
reaction when I say catalyzing it means
speeding up the reaction basically
majority of the enzymes are protein
Isha's in nature or they are made up of
minor acid small building blocks of
proteins enzymes are found as bio
catalyst bio means biology and catalyst
means a biomolecules that helps us to
speed up chemical reactions in
biochemical system which is it could be
a human system enzymes participate in
reaction by combining with substrate an
example of an enzyme would be trypsin
enzymes okay enzymes speed up the
reaction process working of enzyme is
enzymes basically work function as lock
and key model for example for a
particular lock there is one key
similarly for a particular substrate
there is only one enzyme present or
there is a family of enzyme that is
pressed enzymes work in a certain manner
an enzyme has the active site and to
this active site a substrate will bind
when a substrate binds to the enzyme on
its active site it forms es complex or
enzyme substrate complex
now this enzyme substrate complex will
react in a certain manner and it will
form product now once the product is
formed this product cannot fit the
active site of an enzyme and hence this
product is removed out it goes to the
place where it has to be used and the
enzyme along with its active site come
back to its original position and then
the reaction will start once again you
can see in this reaction that enzyme is
not changing its shape as well as the
active site of an enzyme remains intact
this is the reason what enzymes are
needed in small contributions students
in this part of the chapter we have
studied the working of an enzyme and how
active side of the enzyme remains intact
during the chemical reaction I hope you
all have understood the working of the
enzyme clearly thank you
