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Cellular Organelles — Revision Notes

CBSE · Class 11 · Biotechnology

Cellular Organelles revision notes for CBSE Class 11 Biotechnology: 4 topics in quick points. Includes Plasma Membrane, Cell Wall and Endomembrane System.

93 questions120 flashcards5 concepts

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A comparison chart highlighting key differences between prokaryotic and eukaryotic cells, including nucleus, membrane-bound organelles, size, ribosomes, and DNA structure.
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Key Topics to Revise

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1. Plasma Membrane

  • The plasma membrane forms the boundary of the cytoplasm and controls the movement of substances into and out of the cell.
  • It is selectively permeable and has a lipid bilayer with proteins embedded in it.
  • The Fluid Mosaic Model was proposed by Seymour Jonathan Singer and Garth L. Nicolson in 1972.
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2. Cell Wall

  • Cell wall is present in bacteria, algae, fungi, and higher plants, but not in animal cells.
  • In bacteria, the wall is made of polysaccharide chains cross-linked by small peptides.
  • Bacterial cell wall is a covalent shell of peptidoglycan chains cross-linked by tetrapeptides.
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3. Endomembrane System

  • The endomembrane system includes endoplasmic reticulum, Golgi complex, lysosomes, and vacuole.
  • These organelles work together in synthesis, processing, packaging, and transport.
  • ER is present only in eukaryotic cells.
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4. Mitochondria

  • Mitochondria are found in nearly all eukaryotic cells.
  • A typical mitochondrion is sausage shaped and about 3.0 to 10.0 µm long and 0.5 to 1.5 µm wide.
  • It has a double membrane.

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Full Notes

Key Concepts

The plasma membrane forms the boundarySmall molecules may move passively byThe cell wall is foundThe endomembrane system includes the endoplasmicER is present only in eukaryotic

Frequently Asked Questions

What are the important topics in Cellular Organelles for CBSE Class 11 Biotechnology?
Key topics in Cellular Organelles include Plasma Membrane, Cell Wall, Endomembrane System, Mitochondria. Study these first, then practise questions on each for Class 11 exams.
How should I revise Cellular Organelles for Class 11 exams?
Learn the core ideas first, then work through the 93 practice questions on Cellular Organelles. 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 CBSE Class 11 Biotechnology Revision Notes

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