Class 9 Exam > Class 9 Videos > Nucleus and Endoplasmic Reticulum - Cell Biology - Class 9 - Science
Nucleus and Endoplasmic Reticulum - Cell Biology - Class 9 - Science Video Lecture
FAQs on Nucleus and Endoplasmic Reticulum - Cell Biology - Class 9 - Science Video Lecture
| 1. What is the function of the nucleus in a cell? |  |
Ans. The nucleus is the control center of a cell and carries the cell's genetic material in the form of DNA. It regulates the cell's activities, such as growth, metabolism, and reproduction.
| 2. How is the endoplasmic reticulum involved in protein synthesis? | |
Ans. The endoplasmic reticulum (ER) plays a crucial role in protein synthesis. It consists of rough ER, which is studded with ribosomes, where protein synthesis occurs. The ribosomes on the ER synthesize proteins that are then transported and modified within the ER.
| 3. What happens if the nucleus is damaged or removed from a cell? | |
Ans. If the nucleus is damaged or removed from a cell, the cell will lose its ability to control its activities and replicate properly. It may result in cell death or malfunctioning, as the genetic information stored in the nucleus is essential for the cell's normal functioning.
| 4. How does the endoplasmic reticulum contribute to lipid metabolism? | |
Ans. The smooth endoplasmic reticulum (SER) is responsible for lipid metabolism in the cell. It synthesizes lipids, such as cholesterol and phospholipids, and helps in detoxification processes by breaking down harmful substances. The SER also plays a role in storing and releasing calcium ions, which are important for various cellular processes.
| 5. Can the endoplasmic reticulum be found in all types of cells? | |
Ans. Yes, the endoplasmic reticulum (ER) is present in all eukaryotic cells, including animal, plant, and fungal cells. However, the amount and structure of the ER may vary depending on the cell type and its specific functions. For example, cells that produce a large amount of proteins, such as pancreatic cells, have a well-developed rough endoplasmic reticulum (RER), while cells involved in lipid metabolism, like liver cells, have a prominent smooth endoplasmic reticulum (SER).
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Nov 15, 2024 Last updated |
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