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PPT: Cell- The Building Block of Life
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FAQs on PPT: Cell- The Building Block of Life
| 1. What are the basic structural components of a cell? |  |
Ans. The basic structural components of a cell include the cell membrane, cytoplasm, and the nucleus. The cell membrane acts as a protective barrier, controlling the movement of substances in and out of the cell. The cytoplasm is a jelly-like substance where various organelles are suspended, facilitating metabolic processes. The nucleus contains the genetic material and is responsible for regulating cell activities.
| 2. What is the function of the cell membrane? | |
Ans. The cell membrane serves multiple essential functions, including providing structure and protection to the cell, regulating the passage of substances, and facilitating communication with other cells. It is selectively permeable, meaning it allows certain molecules to enter or exit while blocking others, thus maintaining the cell's internal environment.
| 3. How do plant cells differ from animal cells? | |
Ans. Plant cells differ from animal cells in several key ways. Plant cells have a rigid cell wall made of cellulose, which provides additional support and structure. They also contain chloroplasts, which are necessary for photosynthesis, and large central vacuoles that store nutrients and waste products. In contrast, animal cells lack a cell wall and chloroplasts and typically have smaller vacuoles.
| 4. What are organelles, and why are they important? | |
Ans. Organelles are specialised structures within a cell that perform distinct functions necessary for the cell's survival and operation. They are important because they enable the cell to carry out various processes efficiently. For example, mitochondria are responsible for energy production, ribosomes synthesise proteins, and the endoplasmic reticulum plays a role in the synthesis and transport of biomolecules.
| 5. What role do cells play in the organisation of living organisms? | |
Ans. Cells are the fundamental units of life and serve as the building blocks of all living organisms. They combine to form tissues, which then group together to form organs. These organs work in systems that perform specific functions, contributing to the overall functioning of the organism. Thus, cells are essential for growth, development, and maintaining homeostasis in living beings.
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Apr 25, 2026 Last updated
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Document Description: PPT: Cell- The Building Block of Life for Class 9 2026 is part of Science Class 9 New NCERT 2026-27 (New Syllabus) preparation. The notes and questions for PPT: Cell- The Building Block of Life have been prepared according to the Class 9 exam syllabus. Information about PPT: Cell- The Building Block of Life covers topics like and PPT: Cell- The Building Block of Life Example, for Class 9 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for PPT: Cell- The Building Block of Life.
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