Skip to main content
Super TutorResources
Chapter 9 of 19
Revision Notes

Biomolecules — Revision Notes

CBSE · Class 11 · Biology

Biomolecules revision notes for CBSE Class 11 Biology: 4 topics in quick points. Part of the CBSE Class 11 Biology syllabus.

131 questions96 flashcards5 concepts

Interactive on Super Tutor

Studying Biomolecules? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for revision notes and more.

Try Super Tutor — Free

Free trial, no card needed.

Key Topics to Revise

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.

Get complete notes with diagrams and examples

Full Notes

Key Concepts

Elemental analysis of living matter showsCompounds with molecular weights from aboutPrimary metabolites are common compounds foundAmino acids are αProteins are polypeptides made of amino

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.

More resources for Biomolecules

All CBSE Class 11 Biology Revision Notes

For serious students

Get the full Biomolecules chapter — start free.

Quizzes, flashcards, an AI doubt solver and a study plan for CBSE Class 11 Biology. Free to start, no card needed.

Try Super Tutor Free
Try this chapter free