1. Amino acids
  2. Nucleotides
  3. Lipid molecules
  4. All of the above
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Option 4 : All of the above

  • All of the above biological molecules are necessary for animals at the Cellular Level.
  • When proteins break downs, it forms amino acid.
  • Lipid molecules are a combination of oil and fats.
  • Nucleotides are building blocks of DNA and RNA.
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