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Cell - The Structure and Functions

ICSE · Class 6 · Biology

Quick revision notes for Cell - The Structure and Functions — ICSE Class 6 Biology. Key concepts, formulas, and definitions for last-minute revision.

94 questions30 flashcards4 concepts

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An infographic comparing the three main types of plastids: chloroplasts (green, photosynthesis), chromoplasts (colored, pigment storage), and leucoplasts (colorless, storage of starch, oils, proteins
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Key Topics to Revise

1

Discovery of the Cell

  • Robert Hooke discovered cells in 1665 while observing a thin slice of cork under a microscope.
  • He saw box-like structures and called them 'cells' because they looked like small rooms (like monks' cells in a monastery).
  • Antonie van Leeuwenhoek was the first to observe living cells, such as bacteria and red blood cells, using a simple microscope.
2

Cell Shape, Size, and Number

  • Cells vary in shape (spherical, oval, spindle-shaped, irregular, rectangular) depending on their function.
  • Red blood cells are spherical to carry more oxygen; nerve cells are long to transmit signals.
  • Amoeba has an irregular (amoeboid) shape and can change it to move and eat.
3

Cell Theory

  • Proposed by Schleiden, Schwann, and Virchow.
  • All living organisms are made of one or more cells.
  • The cell is the structural and functional unit of life.
4

Structure of a Cell

  • All cells have three main parts: cell membrane, cytoplasm, and nucleus.
  • Plant cells have additional structures: cell wall, large vacuole, and plastids.
  • Animal cells lack cell wall and plastids; they have small vacuoles.

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Full Notes

Key Concepts

Robert Hooke first discovered cellsEvery cell has three main partsInside the cytoplasm are small structuresPlant cells have a cell wall

Frequently Asked Questions

What are the important topics in Cell - The Structure and Functions for ICSE Class 6 Biology?
Key topics in Cell - The Structure and Functions include Cell Structure and Components Overview, Cell Structure and Components Overview, Cell - Complete Concept Map. These are the concepts ICSE Class 6 examiners draw on most — study them first, then practise related questions.
How to score full marks in Cell - The Structure and Functions — ICSE Class 6 Biology?
Understand the core concepts first, then work through the 94 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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