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➡️ smallest cellular organelle-ribosome
➡️ Largest cellular organelles in plant-plastids
 ➡️ Largest cellular organelle in animals -mitochondria
➡️ Largest cell structure -nucleus
➡️ The theme protoplasmic projection Connecting two adjacent plant cells -plasmodesmata.
➡️ The connecting layer between two adjacent plant cells-middle lamella.
➡️ The membrane of vacuole in plant cell is called tonoplast.
➡️ Mitochondria and plastids can replicate themselves.
➡️ Viruses are neither prokaryotic or Eukaryotic they are acellular.
➡️ Viruses are molecular organisms
➡️ In prokaryotic cell DNA is not enclosed in A nucleus membrane so it is called nucleoid.
➡️ In prokaryotic cells ribosome are present but are in smaller size and other membrane bound organelles are absent.
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FAQs on Class 9 science chapter 5 important facts of chapter

1. What is the importance of Chapter 5 in Class 9 Science?
Ans. Chapter 5 in Class 9 Science is important as it covers the topic of "The Fundamental Unit of Life" which is essential for understanding the basic structure and functions of living organisms. It introduces students to the concept of cells and their significance in biological systems.
2. What are the main topics covered in Chapter 5 of Class 9 Science?
Ans. Chapter 5 of Class 9 Science covers the following main topics: 1. Introduction to cells 2. Discovery of cells 3. Cell theory 4. Types of cells - Prokaryotic and Eukaryotic cells 5. Structure and functions of different cell organelles 6. Comparison between plant and animal cells
3. What is the cell theory mentioned in Chapter 5 of Class 9 Science?
Ans. The cell theory mentioned in Chapter 5 of Class 9 Science states that: 1. All living organisms are composed of cells. 2. Cells are the basic units of structure and function in living organisms. 3. Cells arise from pre-existing cells through cell division.
4. What is the difference between prokaryotic and eukaryotic cells discussed in Chapter 5?
Ans. Chapter 5 of Class 9 Science discusses the difference between prokaryotic and eukaryotic cells as follows: 1. Prokaryotic cells lack a well-defined nucleus, while eukaryotic cells have a true nucleus. 2. Prokaryotic cells are generally smaller and simpler in structure compared to eukaryotic cells. 3. Prokaryotic cells do not have membrane-bound organelles, while eukaryotic cells have various membrane-bound organelles such as mitochondria, endoplasmic reticulum, Golgi apparatus, etc.
5. How do plant and animal cells differ according to Chapter 5 of Class 9 Science?
Ans. According to Chapter 5 of Class 9 Science, plant and animal cells differ in the following ways: 1. Plant cells have a rigid cell wall composed of cellulose, while animal cells lack a cell wall. 2. Plant cells have plastids such as chloroplasts for photosynthesis, while animal cells do not possess plastids. 3. Plant cells have a large central vacuole for storage of water and other substances, while animal cells have smaller vacuoles or may lack them altogether.
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