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Audio Notes: Cell Cycle and Cell Division
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FAQs on Audio Notes: Cell Cycle and Cell Division
| 1. What are the main stages of the cell cycle? |  |
Ans. The cell cycle consists of several key stages: Interphase, which includes G₁ (Gap 1), S (Synthesis), and G₂ (Gap 2) phases, followed by M phase (Mitosis). During Interphase, the cell grows, duplicates its DNA, and prepares for division. Mitosis is the process where the cell divides into two daughter cells, followed by cytokinesis, where the cytoplasm divides.
| 2. What occurs during the S phase of the cell cycle? | |
Ans. During the S phase, DNA replication occurs, where each chromosome is duplicated to form sister chromatids. This ensures that each daughter cell will receive an identical set of chromosomes during cell division. The cell also continues to grow and synthesizes proteins necessary for mitosis.
| 3. How does mitosis differ from meiosis? | |
Ans. Mitosis and meiosis are both processes of cell division but serve different purposes. Mitosis results in two genetically identical daughter cells, maintaining the same chromosome number as the parent cell, which is crucial for growth and repair. In contrast, meiosis produces four genetically diverse daughter cells, each with half the chromosome number, which is essential for sexual reproduction.
| 4. What role do checkpoints play in the cell cycle? | |
Ans. Checkpoints are critical regulatory points in the cell cycle that ensure proper division and prevent errors. They monitor the cell's internal and external environment, checking for DNA damage, adequate growth, and complete DNA replication. If issues are detected, the cell cycle may be paused (arrested) to allow for repair or, if the damage is irreparable, the cell may undergo apoptosis (programmed cell death).
| 5. Why is the regulation of the cell cycle important in preventing cancer? | |
Ans. The regulation of the cell cycle is vital for maintaining normal cell growth and division. Disruptions in the regulatory mechanisms can lead to uncontrolled cell proliferation, a hallmark of cancer. Tumour suppressor genes and proto-oncogenes play key roles in regulating the cell cycle; mutations in these genes can result in tumour formation and cancer progression. Proper regulation ensures that damaged cells do not divide and that tissue homeostasis is maintained.
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Apr 17, 2026 Last updated
Audio Description: Audio Notes: Cell Cycle and Cell Division for NEET 2026 is part of Biology Class 11 preparation. The notes and questions for Audio Notes: Cell Cycle and Cell Division have been prepared according to the NEET exam syllabus. Information about Audio Notes: Cell Cycle and Cell Division covers all important topics for NEET 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Audio Notes: Cell Cycle and Cell Division.
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