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Components of a Cell - Class 9 Biology - Science Video Lecture | CBSE Class 9 Biology(CELLS)-Videos & Documents by Let's tute

6 videos|3 docs

FAQs on Components of a Cell - Class 9 Biology - Science Video Lecture - CBSE Class 9 Biology(CELLS)-Videos & Documents by Let's tute

1. What are the main components of a cell?
Ans. The main components of a cell are the cell membrane, cytoplasm, and 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 that fills the cell and contains various organelles. The nucleus is the control center of the cell, containing the genetic material and regulating cell activities.
2. What is the function of the cell membrane?
Ans. The cell membrane has several important functions. It acts as a barrier, controlling the movement of substances in and out of the cell. It also provides structural support and protection to the cell. Additionally, the cell membrane plays a role in cell communication and recognition, allowing cells to interact with each other.
3. What is the cytoplasm?
Ans. The cytoplasm is a jelly-like substance that fills the cell. It is composed of water, salts, and various organic molecules. The cytoplasm contains several organelles, such as the mitochondria, endoplasmic reticulum, and ribosomes, which carry out specific functions within the cell. It also serves as a medium for the transport of molecules and provides support to the cell structures.
4. What is the role of the nucleus in a cell?
Ans. The nucleus is the control center of the cell. It contains the genetic material, including DNA, which carries the instructions for the cell's activities and determines its characteristics. The nucleus regulates gene expression, cell division, and the synthesis of proteins. It is also involved in the transmission of genetic information to the next generation during cell reproduction.
5. What are organelles in a cell?
Ans. Organelles are specialized structures within a cell that perform specific functions. They are like tiny organs within a cell. Examples of organelles include the mitochondria, which produce energy for the cell, the endoplasmic reticulum, involved in protein synthesis and lipid metabolism, and the Golgi apparatus, responsible for packaging and modifying proteins. Each organelle has a specific role in maintaining the cell's overall function and survival.
6 videos|3 docs
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