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Biomolecules

CBSE · Class 11 · Biology

Complete topic list for Biomolecules in CBSE Class 11 Biology. Key concepts, sub-topics, and what to focus on for board exams.

131 questions96 flashcards5 concepts

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4 Topics · CBSE Class 11 Biology

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

Frequently Asked Questions

What are the important topics in Biomolecules for CBSE Class 11 Biology?
Biomolecules covers several key topics that are frequently asked in CBSE Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Biomolecules — CBSE Class 11 Biology?
Understand the core concepts first, then work through the 131 practice questions available for this chapter. Revise formulas and 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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All 19 chapters — CBSE Class 11 Biology Syllabus

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