Skip to main content
Super TutorResources
Chapter 2 of 12
QuestionsNotesFlashcardsSummaryFormulasQuizConceptsSyllabusPlan
Revision Notes

Cellular Organelles

CBSE · Class 11 · Biotechnology

Quick revision notes for Cellular Organelles — CBSE Class 11 Biotechnology. Key concepts, formulas, and definitions for last-minute revision.

5 concepts

Interactive on Super Tutor

Studying Cellular Organelles? 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

Plasma Membrane

  • Plasma membrane forms the boundary of the cytoplasm and is semipermeable in nature.
  • The widely accepted model is the Fluid Mosaic Model proposed by Singer and Nicolson in 1972.
  • The membrane is composed of a phospholipid bilayer with a mosaic of globular proteins embedded in it.
2

Cell Wall

  • Cell wall is found in bacteria, algae, fungi, and higher plants — NOT in animal cells.
  • Functions: provides rigidity, shape, protection from osmotic pressure, mechanical strength, cell-cell interaction, and protection from infection.
  • Bacterial cell wall: composed of peptidoglycan (polysaccharide cross-linked by small peptides).
3

Endomembrane System

  • Endomembrane system is exclusive to eukaryotic cells.
  • It includes: Endoplasmic Reticulum (ER), Golgi Apparatus, Lysosomes, and Vacuoles.
  • These organelles work in a coordinated manner for protein and lipid synthesis, processing, packaging, and transport.
4

Mitochondria

  • Found in nearly all eukaryotic cells; absent in prokaryotes.
  • Also called the 'powerhouse of the cell' as they generate ATP through cellular respiration.
  • Shape: typically sausage-shaped or rod-shaped; size: 3.0–10.0 μm long, 0.5–1.5 μm wide.

Get complete notes with diagrams and examples

Full Notes

Key Concepts

The plasma membrane is a selectivelyMolecules cross the plasma membrane byFound in bacteriaThe endomembrane system is a groupMitochondria are double membrane

Frequently Asked Questions

What are the important topics in Cellular Organelles for CBSE Class 11 Biotechnology?
Key topics in Cellular Organelles include Cellular Organelles — Complete Chapter Overview, Overview of Cellular Organelles, Overview of Cellular Organelles. These are the concepts CBSE Class 11 examiners draw on most — study them first, then practise related questions.
How to score full marks in Cellular Organelles — CBSE Class 11 Biotechnology?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision 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 Cellular Organelles

All 12 chapters — CBSE Class 11 Biotechnology Revision Notes

For serious students

Get the full Cellular Organelles chapter — for free.

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

Try Super Tutor Free
Try the full chapter — Free