Water is the most important compound in living organisms. Organisms are
comprised of 70-90% H2O. Water resists temperature change and when
frozen is less dense than liquid H2O. Water is polar, has adhesive and cohesive
properties.
Proteins provide structure for tissues and
Nucleic acids are the most complex
organs. They also carry out cell metabolism.
biomolecule that stores cellular
Proteins are comprised of amino acids.
information. They are polymers
Enzymes are types of proteins that act as
formed from nucleotides. Two
catalysts. Proteins twist and fold, keeping
nucleic acids are DNA and RNA.
their shape with the help of hydrogen bonds.
• Carbohydrates are composed of
carbon, hydrogen and oxygen.
Simple sugars are
monosaccharide's and complex
sugars are polysaccharides.
Starch, glycogen and cellulose are
all forms of carbohydrates. It can
give structural support, energy
and is also found in the cell wall.
• Glucose
• Lipids are nonpolar and are
usually referred to as fats. They
can store energy in the cell and
be found in the cell membrane.
Lipids are either saturated and
unsaturated. Cholesterol is also a
lipid.