April 26, 2014

Biomolecules - Introduction

Biomolecules
- Molecules involved in maintenance and metabolic processes of living organisms
- Organic biomolecules contain:
   - Hydrogen
   - Carbon
   - Oxygen
   - Nitrogen
   - Sulphur
- Formed by condensation reaction
   - The forming of covalent bonds by removing a water molecule
 - Split by hydrolysis
   - The splitting of covalent bonds by adding a water molecule
- 4 main types:
   - Carbohydrates
   - Lipids
   - Proteins
   - Water


Overview of Condensation Reaction


Monomer Polymer Formed By-product Bond Name
Monosaccharide (simple sugar) Disaccharide --> Polysaccharide Water
Glycosidic Bond
(-O-)

Amino acid Dipeptide --> Polypeptide Water
Peptide Bond 
(C-N)

Glycerol
Fatty acids
Monoglycerides
Diglycerides
Triglycerides
(Glyrcerol attached to fatty acids)
Water
Ester bond
(-O-)
[amino acids]


DNA/RNA DNA Water Phosphodiester bond