central to the function of
living cells. Arranged in a
linear sequence within
DNA, they code for the
structure and function of
the body's proteins.
Proteins
workhorses of the body's
machinery. Proteins carry
out specific functions
inside cells, and they act as
enzymes to catalyze
reactions all over the body.
Lipids
help the body store
the energy it needs
in the form of fats
and oils.