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Monday, 1 September 2008

5.1 Carbon skeleton and functional groups:










Carbon skeleton and functional groups
Carbon has only four highest electrons in its energy level. total holds eight electrons.
* Carbon can form up to four bonds with other atoms. Example: carbon and hydrogen=hydrocarbon ( fuels).
* Methane: natural gas to heat homes. *hydrophlic-water-loving.
Monomers and polymers
*biomolecules may be composed of hundreds or even millions of atoms.
Every living thing's cells has thousands of different kinds of polymers. (polymers are built out of 50 kinds of monomers. For example, the spider's web, which is made from protein, is an example of polymer). Life's largest molecules: CARBOHYDRATES, LIPIDS, PROTEINS,NUCLEUR ACID( or DNA).
Building and breaking Polymers
organisms make polymers. * breaks to monomers so available for cells.
Each time a monomer is added to a chain, it releases the water molecules ( dehydration reaction).
* water is removed to build polymers, water is added to break it down.

Concept check

1.


2. Explain the connection between monomers and polymers
-polymers is a chain that is made up of a lot of monomers.
3.What molecule is released durig conrtuction of a polymer. What is this reaction called?
-The dehydration reaction is the name. It releases de- water (hydro)

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