Chitin has what element added to each monomer?

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Multiple Choice

Chitin has what element added to each monomer?

Explanation:
The key idea is that chitin is built from N-acetylglucosamine units, which have an acetyl group attached to an amine on each sugar. That attachment introduces a nitrogen atom into every monomer, so nitrogen is the element added to each unit. This nitrogen-containing amide (the N-acetyl group) is what differentiates chitin from polymers like cellulose, which are made from plain glucose without any nitrogen.

The key idea is that chitin is built from N-acetylglucosamine units, which have an acetyl group attached to an amine on each sugar. That attachment introduces a nitrogen atom into every monomer, so nitrogen is the element added to each unit. This nitrogen-containing amide (the N-acetyl group) is what differentiates chitin from polymers like cellulose, which are made from plain glucose without any nitrogen.

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