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Cell - The Unit of Life PPT Biology Class 11

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FAQs on Cell - The Unit of Life PPT Biology Class 11

1. What is a cell?
Ans. A cell is the basic unit of life, and it is the smallest structural and functional unit of all living organisms. It is responsible for carrying out various processes necessary for the organism's survival.
2. What are the different types of cells?
Ans. There are two types of cells: prokaryotic and eukaryotic cells. Prokaryotic cells, found in bacteria and archaea, lack a true nucleus and membrane-bound organelles. Eukaryotic cells, found in plants, animals, fungi, and protists, have a true nucleus and various membrane-bound organelles.
3. What are the functions of a cell?
Ans. Cells perform multiple functions necessary for the organism's survival. These functions include metabolism, reproduction, growth, response to stimuli, and maintaining homeostasis. They also carry out specialized functions based on the type of cell, such as photosynthesis in plant cells or transmitting nerve impulses in nerve cells.
4. What are organelles?
Ans. Organelles are specialized structures within a cell that perform specific functions. Examples of organelles include the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, and chloroplasts. Each organelle has a specific role in carrying out cellular processes.
5. How do cells communicate with each other?
Ans. Cells communicate with each other through various mechanisms. One common way is through chemical signals, where cells release signaling molecules that are detected by receptor proteins on the surface of target cells. This communication helps coordinate the activities of different cells and tissues in an organism. Additionally, cells can also communicate through direct physical contact or through electrical signals in nerve cells.
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