CBSE Class 12 Chemistry - Biomolecules Chapter Notes. Learning the important concepts is very important for every student to get better marks in examinations. The concepts should be clear which will help in faster learning. The attached concepts made as per NCERT and CBSE pattern will help the student to understand the chapter and score better marks in the examinations.
Chapter : Biomolecules
1. Definition of carbohydrates: Polyhydroxy aldehydes or polyhydroxyketones or compounds which give these on hydrolysis.
2. Classification of carbohydrates:
Cannot be hydrolysed into simpler compounds
E.g. Glucose, mannose
Carbohydrates which give 2 to 10 monosaccharide units on hydrolysis
E.g. Sucrose, Lactose, Maltose
Carbohydrates which on hydrolysis give large number of monosaccharideunits.
E.g. Cellulose, starch
3. Anomers: Such pairs of optical isomers which differ in configuration onlyaround C1 atom are called anomers. E.g. -D-glucopyranose and -D-glucopyranose
4. Epimers: Such pairs of optical isomers which differ in configurationaround any other C atom other than C1 atom are called epimers. E.g. D-glucose and D- mannose are C2 epimers.
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