Multiple choice

Proteins are

  1. polypeptides

  2. polyacids

  3. polyphenols

  4. polyesters

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Proteins are biopolymers composed of amino acid monomers linked by peptide bonds (amide bonds between -NH2 and -COOH groups). The peptide bond formation creates polypeptide chains, which fold into functional three-dimensional protein structures. All other options describe incorrect polymer types.

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