A level Biology exam revision resources written by A level Examiners





 

Carbohydrates are biological molecules which are constructed from the elements carbon, hydrogen and oxygen. They contain these in the ratio of two hydrogen atoms to each carbon and hydrogen. C:H2:O. Because of this a general formula for carbohydrates can be written as:


Cn(H2O)n

The group includes monomers, dimers, and polymers, as shown in the table below:



Monomer
Monosaccharide

Dimer
Disaccharide

Polymer
Polysaccharide



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