Cell The Unit of Life important points: Cell is the basic unit of life and is defined as smallest unit that can perform all functions necessary for life. It is building block of all the living organisms and is composed of different structures and different organelles that work together to maintain cell’s life. These structures includes the plasma membrane, cytoplasm, nucleus, mitochondria, ribosomes, and endoplasmic reticulum, among others.
The cell’s ability to divide and produce the new cells, stores and uses energy, respond to stimuli, and carry out the metabolic processes is what makes it the fundamental unit of life.
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NEET Biology NCERT Class 11 Chapter 9, 25 important points – Cell The Unit of Life Important Points
There are 25 important points on Cell The Unit of Life Important Points
1. Cells are basic unit of life and are found in all the living organisms, from single-celled organisms to the complex multicellular organisms.
2. Cells are classified into two main types: prokaryotic cells (found mainly in bacteria) and the eukaryotic cells (found mainly in animals, plants, fungi, and protists).
3. Discovery of cells is credited to Robert Hooke in the year 1665.
4. The cell theory, first proposed by Matthias Schleiden and Theodor Schwann in 19th century, states that all the living things are made of cells and cells are the basic and structural unit of life.
5. The structure of a cell is divided into two main parts: cell membrane and cytoplasm.
6. The cell membrane, also called as the plasma membrane, is a selectively permeable barrier that separates cell from its environment.
7. The cytoplasm, located inside cell membrane, contains of cell’s organelles and other cellular components.
8. The nucleus, located in cytoplasm, is the control center of the cell and contains cell’s genetic material.
9. Eukaryotic cells also contains other organelles such as the mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, and centrosome.
10. Mitochondria called as the powerhouse of the cell, generating energy for all the cell’s activities.
11. Ribosomes are responsible for producing the proteins.
12. The endoplasmic reticulum and the Golgi apparatus are involved in the protein synthesis and it’s modification.
13. Lysosomes contains the digestive enzymes and breaks down the cellular waste and the foreign substances.
14. The centrosome, located near nucleus, is involved in the cell division.
15. Plant cells also have a cell wall, a rigid outer layer that provides support and protection to the cell.
16. Chloroplasts, found only in the plant cells, are involved in the process of photosynthesis.
17. Cells reproduces through cell division, which can occur by either mitosis (in eukaryotic cells) or by binary fission (in prokaryotic cells).
18. Cells can communicate with each other through gap junctions and signal transduction.
19. Cells can also specialize and differentiate into the different types of cells, such as the muscle cells or the nerve cells, to perform the specific functions.
20. Cells are sensitive to their environment and respond to changes through the processes such as osmosis, diffusion, and active transport.
21. Cells can also sense and respond to stimuli through the cell signaling.
22. Study of cells is known as cell biology and is important for understanding the basic workings of life and for the development of the medicine and biotechnology.
23. Cells are affected by the various diseases and conditions, including cancer, which is caused by the abnormal cell growth and division.
24. Understanding structure and function of the cells is also crucial for understanding the genetic disorders and the mechanisms of aging.
25. Advances in the technology have allowed for studying the cells at a molecular level, providing new insights into the inner workings of the cells and their role in the health and disease.
Some Important Questions From Biology Class 11
| Chapter Name | Quiz Link |
| The Living World | Play Now |
| Biological Classification | Play Now |
| Plant Kingdom | Play Now |
| Animal Kingdom | Play Now |
| Morphology of flowering plants | Play Now |
| Anatomy of flowering plants | Play Now |
| Cell: the unit of life | Play Now |
| Biomolecules | Play Now |
| Cell Cycle and cell division | Play Now |
| Transport in Plants | Play Now |
| Structural organisation in Animals | Play Now |
| Mineral nutrition | Play Now |
| Photosynthesis in higher plants | Play Now |
| Respiration in plants | Play Now |
| Plant Growth and development | Play Now |
| Digestion and Absorption | Play Now |
| Breathing and Exchange of Gases | Play Now |
| Body fluids and circulation | Play Now |
| Excretory products and their elimination | Play Now |
| Locomotion and Movement | Play Now |
| Neural Control and Coordination | Play Now |
| Chemical Coordination and Integration | Play Now |
Some Important Questions From Biology Class 12
| Chapter Name | Quiz Link |
| Reproduction in organism | Play Now |
| Sexual reproduction in flowering plant | Play Now |
| Human reproduction | Play Now |
| Reproductive health | Play Now |
| Principles of inheritance and variation | Play Now |
| Molecular basis of inheritance | Play Now |
| Evolution | Play Now |
| Human health and disease | Play Now |
| Strategies for enhancement in food product | Play Now |
| Microbes in human welfare | Play Now |
| Biotechnology principles and processes | Play Now |
| Biotechnology and its application | Play Now |
| Organism and population | Play Now |
| Ecosystem | Play Now |
| Biodiversity and its conservation | Play Now |
| Environment issue | Play Now |
155 out of 200 questions were directly asked from these notes in NEET 2024
