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Question

Which of these is not a protein?
  1. Trypsin
  2. Collagen
  3. Rubisco
  4. N-acetylglucosamine

A
N-acetylglucosamine
B
Trypsin
C
Rubisco
D
Collagen
Solution
Verified by Toppr

N-acetylglucosamine is a monosaccharide and derivative of glucose. It is an amide between glucosamine and acetic acid. It has a molecular formula of C8H15NO6.
Chitin is a polysaccharide. It is an important component of the cell wall of fungi. It is a long chain polymer of N-acetylglucosamine. It is a modified form of glucose. The bond formed between the glucose molecule is known as glycosidic linkage.
So, the correct answer is option D.

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