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Cell Structure and Function

Telangana Open School (TOSS) · Class 12 · Biology

Quick revision notes for Cell Structure and Function — Telangana Open School (TOSS) Class 12 Biology. Key concepts, formulas, and definitions for last-minute revision.

47 questions35 flashcards5 concepts

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Key Topics to Revise

1

The Cell Theory

  • All living organisms are made up of cells.
  • The cell is the basic structural and functional unit of life.
  • All cells arise from pre-existing cells (Omnis cellula-e-cellula).
2

Types of Cells

  • There are two main types of cells: Prokaryotic and Eukaryotic.
  • Prokaryotes lack a well-defined nucleus and membrane-bound organelles (e.g., bacteria).
  • Eukaryotes have a true nucleus and membrane-bound organelles (e.g., plants, animals, fungi).
3

Structure and Function of Cell Components

  • Plasma membrane is selectively permeable and made of a phospholipid bilayer with embedded proteins (Fluid Mosaic Model).
  • Cell wall in plants is made of cellulose and provides rigidity and shape.
  • Cytoplasm contains organelles like mitochondria, ER, Golgi, lysosomes, etc.
4

Cell Organelles and Their Functions

  • Endoplasmic Reticulum (ER): Network of membranes; rough ER has ribosomes for protein synthesis, smooth ER for lipid synthesis.
  • Golgi Apparatus: Modifies, sorts, and packages proteins and lipids for secretion or delivery.
  • Lysosomes: Contain digestive enzymes; break down waste and pathogens.

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Full Notes

Key Concepts

The cell theory states that allProkaryotic cells lack a wellPlant cells have a rigid cellEach organelle performs a specific functionThe plasma membrane is selectively permeable

Frequently Asked Questions

What are the important topics in Cell Structure and Function for Telangana Open School (TOSS) Class 12 Biology?
Cell Structure and Function covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Cell Structure and Function — Telangana Open School (TOSS) Class 12 Biology?
Understand the core concepts first, then work through the 47 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.

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