These Biomolecules Class 12 notes cover the Chemistry chapter. Organise each biomolecule group by its basic units, important features and biological role.

Main topics to revise

  • Carbohydrates: distinguish monosaccharides, disaccharides and polysaccharides with textbook examples.
  • Proteins: connect amino acids, peptide bonds and levels of protein structure.
  • Enzymes: understand their catalytic role and specificity at the level required in your textbook.
  • Vitamins: compare water-soluble and fat-soluble groups.
  • Nucleic acids: distinguish the basic components and roles of DNA and RNA.

Quick practice

  • Make a one-page comparison of the major biomolecule groups.
  • Explain a key distinction, such as peptide bond versus glycosidic linkage.
  • Answer a textbook question and check the scientific terms used.

Check your textbook’s prescribed structures and examples. A short summary supports revision but does not replace the detailed chapter.

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