NEET > Biology Class 11 > Cell Division & Cell Cycle
Cell Division & Cell Cycle Video Lecture - Biology Class 11 - NEET
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FAQs on Cell Division & Cell Cycle Video Lecture - Biology Class 11 - NEET
| 1. What is cell division? |  |
Ans. Cell division is the process by which a parent cell divides into two or more daughter cells. It is a fundamental process for the growth, development, and maintenance of all living organisms. Cell division occurs in two main stages: mitosis, where the nucleus divides, and cytokinesis, where the cytoplasm divides.
| 2. What is the cell cycle? | |
Ans. The cell cycle refers to the series of events that take place in a cell leading to its division and duplication. It consists of several phases, including interphase (G1, S, and G2) and mitosis. During interphase, the cell grows, replicates its DNA, and prepares for division. Mitosis is the phase where the nucleus divides, followed by cytokinesis, which completes the cell division process.
| 3. What is the importance of cell division? | |
Ans. Cell division is crucial for various reasons. It allows organisms to grow and develop by increasing the number of cells in their body. It is essential for tissue repair and regeneration. Moreover, cell division plays a role in the formation of gametes (sperm and egg cells) during sexual reproduction, enabling the transmission of genetic information to offspring.
| 4. How is the cell cycle regulated? | |
Ans. The cell cycle is tightly regulated to ensure proper growth and division. Key regulators, such as cyclins and cyclin-dependent kinases (CDKs), control the progression through different phases of the cycle. These regulators activate or inhibit specific proteins that drive the cell cycle. Checkpoints, such as the G1 checkpoint and the G2 checkpoint, monitor DNA integrity and cell size before allowing the cell to proceed to the next phase.
| 5. What are the consequences of abnormal cell division? | |
Ans. Abnormal cell division can have serious consequences. Uncontrolled cell division can lead to the formation of tumors and cancer. On the other hand, insufficient or impaired cell division can result in developmental abnormalities, growth disorders, and tissue degeneration. Understanding the regulation and mechanisms of cell division is essential for identifying and treating various diseases associated with abnormal cell division.
Video Description: Cell Division & Cell Cycle for NEET 2023 is part of Biology Class 11 preparation.
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