The Fundamental Unit of Life One Shot (A to Z) Class 9 | CBSE Class 9 Exams 2023 | Crash Course 2.0

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SUMMARY
5:41 -Structural Organization of Cell:
Cells are the basic building blocks of living organisms, and they exhibit a high degree of organization. The structural organization of a typical eukaryotic cell includes:
Cell Membrane (Plasma Membrane): The outer boundary of the cell that separates it from the external environment and regulates the passage of substances in and out of the cell.
Cytoplasm: The gel-like substance inside the cell that surrounds the organelles. It contains various cellular structures and molecules.
Nucleus: The control center of the cell that contains genetic material (DNA) and directs the activities of the cell.
Organelles: Various specialized structures within the cell that carry out specific functions. These include the endoplasmic reticulum, Golgi apparatus, mitochondria, chloroplasts (in plant cells), lysosomes, and more.
Cell Organelles (1:20:05 in the video):
Here are brief explanations of some of the key cell organelles:
Endoplasmic Reticulum (ER): A network of membranes involved in the synthesis of proteins and lipids.
Golgi Apparatus: Modifies, sorts, and packages proteins and lipids for transport to different parts of the cell or for secretion.
Mitochondria: The powerhouse of the cell, where cellular respiration takes place to produce energy (ATP).
Lysosomes: Vesicles containing enzymes that break down cellular waste and foreign materials.
Cell Division (1:44:50 in the video):
Cell division is the process by which a cell divides into two or more daughter cells. There are two main types of cell division:
Mitosis: The division of somatic (body) cells, resulting in two identical daughter cells. It is crucial for growth, development, and tissue repair.
Meiosis: The division of germ cells (sperm and egg cells), resulting in cells with half the number of chromosomes. Meiosis is essential for sexual reproduction

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(26:21) Ma'am I am not able understand Plasma membrane

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1. What would happen if the plasma membrane break downs mam

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If the plasma membrane breaks down, it would result in the loss of cell integrity and the inability to regulate what enters and exits the cell. This can lead to cell death, as essential molecules may leak out and harmful substances may enter, disrupting cellular processes.

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1. 1:20:49

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Hey Amith, Check out the below link for the session "Structure of Atom in One Shot (A to Z) Class 9 Chemistry | CBSE Class 9 Exams 2023 |Crash Course 2.0" - ua-cam.com/users/liveFM_UGy3Gd38

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Nucleus

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Hello Vaibhav, Check out the below link for the session pdf "The Fundamental Unit of Life One Shot (A to Z) Class 9 | CBSE Class 9 Exams 2023 | Crash Course 2.0" - drive.google.com/file/d/1KyXD8p0CH3wOQ11hqZPAbxT5P5MKOGII/view?usp=share_link

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