Dr. Mohammed Golam Rasul

Dr. Mohammed Golam Rasul
Chemical reactions taking place in
biological systems - animals and plants are
called biochemical reactions.
They follow all the laws of chemistry but are
generally very fast and more efficient than
reactions done in lab.
When an acid reacts with a base to produce a salt
and water.
acid + base  H2O + ionic salt
(H+) (OH-)
Ex. Buffers: Living organisms function properly
in a very small pH range. Buffers are chemicals
that either take up or release H+ or OH- ions to
maintain a constant pH.
Two or more monomers join together to form a
polymer and water.
Reduction Reaction: a gain of electrons.
Ex. O + 2e-  O-2
Oxidation Reaction: a loss of electrons.
Ex. Mg  Mg+2 + 2eRedox Reaction: An oxidation and a
reduction reaction occur at the same time.
The addition of water breaks a polymer into its
Transamination is the transfer of amino
group from one molecule to another
In this type of reaction removal of amine group
takes place
Decarboxylation is a reaction that removes a carboxyl
group and releases carbon dioxide (CO2)