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

Biomolecules

CBSE · Class 11 · Biology

Quick revision notes for Biomolecules — CBSE Class 11 Biology. Key concepts, formulas, and definitions for last-minute revision.

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

1,000+ Class 11 students started this chapter today

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?
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.

More resources for Biomolecules

All 19 chapters — CBSE Class 11 Biology Revision Notes

For serious students

Get the full Biomolecules chapter — for free.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for CBSE Class 11 Biology.

Try Super Tutor Free
Try the full chapter — Free