Which of the following does not contain metal?

Glycoproteins

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Ferritin

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Cytochromes

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Chromoproteins

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Solution

The correct option is A Glycoproteins
Glycoproteins do not contain metal. Glycoproteins are proteins that contain oligosaccharide chains covalently attached to polypeptide side-chains. The carbohydrate is attached to the protein. Glycoproteins are often important integral membrane proteins, where they play a role in cell-cell interactions.

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