Friday, 6 January 2012

2.6 Biological Molecules

Describe the structure of carbohydrates, proteins and lipids as large molecules made up from smaller basic units: starch and glycogen from simple sugar; protein from amino acids; lipid from fatty acids and glycerol.

Carbohydrates
are made up of C(arbon)H(ydrogen)O(xygen)
The simplest carbohydrate are sugars which are monomers. The large molecules are formed through combining sugars are those such as starch and glycogen.  Starch is a straight long chain of glucose whereas glycogen is a long chain of glucose with branches. The stored form of sugar in animals is glycogen and the stored form of sugar in plants is starch.
Proteins
are made up of C(arbon) H(ydrogen) O(xygen) N(itrogen)
The simple smallest molecules in protein is amino acids. The amino acids are also joined together in long chains and it is these chains we describe as proteins.
Lipids
are made up of C(arbon) H(ydrogen) O(xygen)
But the story here is slighty different.
The lipids contain a small molecule glycerol and another called fatty acids. Lipids have two different types of molecules joining together to form the structure of the molecule lipid.


8 comments:

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