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Q: Amino acids can be distinguished from one another by

  • 1
    type of bond between the R group and the rest of the molecule
  • 2
    the number of R groups found on the amino acid molecules
  • 3
    the chemical properties of their R groups
  • 4
    the chemical properties of the amino and carboxyl groups
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Answer : 3. "the chemical properties of their R groups"
Explanation :

Answer: C) the chemical properties of their R groups Explanation: Amino acids are organic compounds containing amine (-NH2) and carboxyl (-COOH) functional groups, along with a side chain (R group) specific to each amino acid.   Depending on the nature of the side chain groups, three classes of aminoacids can e distinguished: 1. Amino acids with H ond donor and acceptor groups. Histidine, lysine, aspartic acid, threonine,... 2. Amino acids with donor grups only. Arginine, tryptophan and cysteine. 3. Amino acids with acceptor groups only. Asparagine and glutamine.

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