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Biomolecules — Revision Notes

ICSE · Class 11 · Biology

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

103 questions44 flashcards3 formulas & key relations5 concepts

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A flowchart illustrating the process of analyzing chemical composition of living tissues, showing how grinding tissue in trichloroacetic acid and straining separates components into an acid-soluble fr
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Key Topics to Revise

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1. Cellular Pool and Chemical Composition of Cells

  • The collection of various types of molecules in a cell is called cellular pool.
  • The cellular pool contains inorganic materials such as water, salts and mineral ions, and organic compounds such as carbohydrates, lipids, amino acids, proteins, nucleotides, nucleic acids and vitamin
  • Nearly 93% of cellular material is made up of carbon, hydrogen and oxygen; about 5% is major metals; and about 2% is non-metals.
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2. Carbohydrates

  • Carbohydrates are widely distributed in plants and animals and are major sources of energy.
  • They are broadly defined as polyhydroxy aldehydes or ketones and their derivatives, or substances that yield one of these compounds on hydrolysis.
  • The general formula of carbohydrates is Cx(H2O)y.
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3. Amino Acids and Proteins

  • Amino acids are the fundamental building blocks of proteins.
  • Alpha-amino acids contain an amino group and a carboxyl group at the alpha-carbon atom.
  • Twenty amino acids are universally found in proteins.
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4. Lipids

  • Lipids are a heterogeneous group of compounds including fats and fat-like substances.
  • They are sparingly soluble in water but soluble in organic solvents such as ether, chloroform, benzene and petroleum ether.
  • Lipids are rich in carbon and hydrogen and generally have less oxygen than carbohydrates.

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Full Notes

Key Concepts

The collection of various typesMicromolecules have molecular weight less thanPrimary metabolites include carbohydratesCarbohydrates are broadly defined as polyhydroxyMonosaccharides are simple sugars that cannot

Frequently Asked Questions

What are the important topics in Biomolecules for ICSE Class 11 Biology?
Key topics in Biomolecules include Cellular Pool and Chemical Composition of Cells, Carbohydrates, 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 103 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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All ICSE Class 11 Biology Revision Notes

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