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PPT: Cell - The Unit of Life
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FAQs on PPT: Cell - The Unit of Life
| 1. What exactly is a cell and why is it called the basic unit of life? |  |
Ans. A cell is the smallest living unit capable of independent life and performing all life functions. It's called the basic unit of life because all living organisms are made of cells, and every cell arises from pre-existing cells through division. This foundational concept underpins NCERT Class 11 Biology and explains why cells are essential to understanding life processes.
| 2. What's the difference between prokaryotic and eukaryotic cells in terms of structure? | |
Ans. Prokaryotic cells lack a membrane-bound nucleus and organelles, with genetic material floating freely in the nucleoid region. Eukaryotic cells contain a true nucleus enclosed by a nuclear membrane and possess membrane-bound organelles like mitochondria and chloroplasts. Understanding this structural distinction is crucial for NEET preparation, as it explains cellular complexity across different organisms.
| 3. How do cell wall and cell membrane work differently even though they're both protective layers? | |
Ans. The cell membrane is a selectively permeable lipid bilayer present in all cells, controlling what enters and exits. The cell wall, found in plant cells and some microorganisms, is a rigid outer layer providing structural support and protection. While the membrane regulates transport, the cell wall provides mechanical strength-this difference is vital for distinguishing plant and animal cell functions on NEET exams.
| 4. Why do plant cells have chloroplasts and animal cells don't? | |
Ans. Chloroplasts enable photosynthesis, allowing plant cells to manufacture their own food using sunlight. Animal cells lack chloroplasts because they obtain energy by consuming organic matter instead. This adaptation reflects the fundamental difference in how plants and animals acquire energy, a key concept tested in CBSE Class 11 Biology assessments and competitive exams.
| 5. What are the main functions of mitochondria and why are they called the powerhouse of the cell? | |
Ans. Mitochondria generate ATP through cellular respiration, providing energy for all cell activities. They're called the powerhouse because they convert glucose and other nutrients into usable chemical energy through oxidative phosphorylation. Both prokaryotic and eukaryotic cells depend on this energy production, making mitochondrial function essential knowledge for understanding cellular metabolism in NEET Biology.
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Document Description: PPT: Cell - The Unit of Life for NEET 2026 is part of Biology Class 11 preparation. The notes and questions for PPT: Cell - The Unit of Life have been prepared according to the NEET exam syllabus. Information about PPT: Cell - The Unit of Life covers topics like and PPT: Cell - The Unit of Life Example, for NEET 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for PPT: Cell - The Unit of Life.
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