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Class 9 Science Chapter 5 Question Answers - The Fundamental Unit of Life

Q.1. Who discovered cells and how?
Q.2. Why is the cell called the structural and functional unit of life?

Q.3. How do substances like CO2 and water move in and out of the cell?

Q.4. Why is the plasma membrane called a selectively permeable membrane?

Q.5. Can you name the two organelles we have studied that contain their own genetic material?

Q.6. If the organization of a cell is destroyed due to some physical and chemical influence, what will happen?

Q.7. Where are proteins synthesized inside the cell?

Q.8. Make a comparison and write down ways in which plant cells are different from animal cells.

Q.9. What would happen if the plasma membrane ruptures or breaks down?

Q.10. What would happen to the life of a cell if there was no Golgi apparatus?

Q.11. How does an Amoeba obtain its food?

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FAQs on Class 9 Science Chapter 5 Question Answers - The Fundamental Unit of Life

1. What is the fundamental unit of life?
Ans. The fundamental unit of life is a cell. All living organisms are made up of cells. Cells are the basic structural and functional unit of life.
2. What are the types of cells?
Ans. There are two types of cells: prokaryotic and eukaryotic cells. Prokaryotic cells are found in bacteria and archaea, while eukaryotic cells are found in plants, animals, fungi, and protists.
3. What is the function of the cell membrane?
Ans. The cell membrane is the outermost layer of the cell that separates the cell from its environment. It regulates the movement of substances in and out of the cell. It also provides support and protection to the cell.
4. What is the difference between plant and animal cells?
Ans. Plant cells have a cell wall, chloroplasts, and a large central vacuole, while animal cells do not have a cell wall, chloroplasts, or a large central vacuole. Plant cells carry out photosynthesis, while animal cells do not.
5. What is the function of the nucleus in a cell?
Ans. The nucleus is the control center of the cell. It contains genetic material in the form of DNA, which regulates the activities of the cell. The nucleus also directs the synthesis of proteins and the cell division process.
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