Proteins: Structure and Functions · NCERT Biology

The chemical and physical properties of amino acids are essentially of the amino, carboxyl and the _______ functional groups.

  1. Hydroxyl
  2. Methyl
  3. R-group
  4. Nitrate
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Correct answer: R-group

The R-group (side chain) determines the specific properties of each amino acid. Based on the nature of the R-group, amino acids can be acidic, basic, neutral, or aromatic.

Difficulty: Medium Question 3 of 20

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