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Syllabus

Biomolecules — Syllabus

CBSE · Class 11 · Biology

What Biomolecules covers in CBSE Class 11 Biology: 4 topics, for the 2026-27 session. Part of the CBSE Class 11 Biology syllabus.

131 questions96 flashcards5 concepts

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4 Topics · CBSE Class 11 Biology · 2026-27

Topics in Biomolecules

1

Chemical Composition of Living Tissues

  • Living tissues and non-living matter contain many of the same elements, but carbon and hydrogen are relatively more abundant in living organisms.
  • Chemical analysis of tissue separates compounds into an acid-soluble pool and an acid-insoluble fraction.
  • The acid-soluble pool contains compounds with molecular weights from 18 to around 800 daltons.
2

Primary and Secondary Metabolites

  • Primary metabolites are compounds such as amino acids, sugars, fatty acids, glycerol, nucleotides, nucleosides, and nitrogen bases.
  • Secondary metabolites are compounds such as rubber, gums, cellulose, alkaloids, flavonoids, essential oils, antibiotics, coloured pigments, scents, and spices.
  • Primary metabolites have direct roles in normal physiological processes.
3

Amino Acids and Proteins

  • Amino acids are organic compounds containing an amino group and an acidic carboxyl group as substituents on the same α-carbon.
  • Amino acids are substituted methanes with four groups attached to the α-carbon: hydrogen, carboxyl group, amino group, and R group.
  • Only 20 types of amino acids occur in proteins.
4

Lipids

  • Lipids are generally water insoluble.
  • Fatty acids have a carboxyl group attached to an R group.
  • The R group of fatty acids may range from 1 to 19 carbons.

Key Concepts

Central concept: Biomolecules are the chemical compounds of living organisms, ranging from small molecules in the acid-soluble pool to large macromolecules such as proteins, nucleic acids, and polysaccharides, with enzymes and biological structure arising from their organisation and interactions.

Chemical composition of living tissuesAcid-soluble poolAcid-insoluble fractionPrimary metabolitesSecondary metabolitesAmino acidsLipidsProteins

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Frequently Asked Questions

What are the important topics in Biomolecules for CBSE Class 11 Biology?
Key topics in Biomolecules include Chemical Composition of Living Tissues, Primary and Secondary Metabolites, Amino Acids and Proteins, Lipids. Study these first, then practise questions on each for Class 11 exams.
How should I revise Biomolecules for Class 11 exams?
Learn the core ideas first, then work through the 131 practice questions on Biomolecules. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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