Which of the following is not a homopolymer?
1. Glucosamine
2. Cellulose
3. Chitin
3. Inulin

Dear student, 
The correct option is 1) glucosamine. Glucosamine is an amino sugar and it is a monosaccharide. It is not a polymer. It is an important constituent of many polymers like chitin.
​​​​​​Cellulose is a homopolymer of glucose units. It is seen naturally in plants, as the storage polysaccharide. 
Chitin is a homopolymer of N-acetylglucosamine units. It is seen in exoskeleton of insects.
Inulin is a homopolymer of fructose units. It is seen in garlic, leek etc.

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1,2,3 options r homopolymer but inulin is an hetropolymer
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