DNA
Structure -
At
its
most
fundamental
level,
life
is
chemistry.
All
living
things
are
made
of molecules.
Moreover,
life
is
sustained
by
thousands
of
chemical
reactions,
and
life
would
be
impossible
without
these
reactions.
Therefore,
in
order
to
have
a
fundamental
understanding
of
life
and
of
the
genetic
material
we
must
know
something
about
its
chemistry.



