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Cell Cycle & Cell Division PPT Biology Class 11

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FAQs on Cell Cycle & Cell Division PPT Biology Class 11

1. What is the cell cycle?
The cell cycle refers to the series of events that occur in a cell leading to its division and the production of two daughter cells. It consists of several phases, including interphase (G1, S, and G2 phases) and mitosis (prophase, metaphase, anaphase, and telophase).
2. What is the role of cell division in the body?
Cell division plays a crucial role in the growth, development, and maintenance of multicellular organisms. It is responsible for producing new cells for tissue repair, replacing old or damaged cells, and enabling the growth of an organism during its development.
3. What happens during the S phase of the cell cycle?
During the S phase of the cell cycle, DNA replication takes place. The cell's genetic material is duplicated, resulting in the formation of two identical copies of each chromosome called sister chromatids. This ensures that each daughter cell receives a complete set of genetic information.
4. How is the cell cycle regulated?
The cell cycle is tightly regulated by various checkpoints and regulatory proteins. Cyclin-dependent kinases (CDKs) and cyclins play a crucial role in controlling the progression of the cell cycle. These proteins ensure that each phase of the cell cycle is completed accurately before proceeding to the next phase.
5. What is the significance of cell cycle regulation in preventing cancer?
Cell cycle regulation is essential in preventing the development of cancer. When the cell cycle is disrupted, and the regulation mechanisms fail, cells can divide uncontrollably, leading to the formation of tumors. Understanding the molecular mechanisms involved in cell cycle regulation is crucial for developing effective cancer treatments that target the abnormal cell division.
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