Proteins -
Proteins
like
nucleic
acids,
are
large
molecular
weight
components
consisting
of
20
different
amino
acids.
The
primary
structure
of
the
protein,
i.e.
the
sequence
of
the
amino
acids
is
determined
by
the
sequence
of
nucleotides
in
the
m-RNA
which
is
in
turn
determined
by
the
sequence
of
nucleotides
in
the
DNA.
Proteins
therefore,
represent
the
information
that
has
been
released
from
the
nucleic
acids
and
serve
a
variety
of
functions
in
cells
and
organisms.
Most
proteins
are
enzymes
i.e.
they
are
biological
catalysts
and
are
therefore
involved
in
cellular
metabolism,
growth
differentiation
and
reproduction.
