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Biochemistry

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Carbohydrates

Question
29 out of 40
 

All of the following are true about proteoglycans except (AIPG 2007)



A Contains amino sugar

B Forms structural element of connective tissue

C Contains small amount of H2O

D Chondroitin sulphate is an example

Ans. C Contains small amount of H2O
  1. GAG + Small amount of proteins -> proteo­glycans (contains >95% carbohydrate)
  2. Special ability to bind large amount of water
  3. Long UN branched, heteropolysaccharide chain which consists of repeated disaccharide units (acidic sugar amino sugar)

a. Amino sugar -> D-glucosamine or D- galactosamine

b. Acidic sugar ->D-glucuronic acid/ L­-iduronic acid

Note: Keratansulphate is an exception in which galactose is present rather than acidic sugar.

Carbohydrates Flashcard List

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