Q1
What are the two main phases of the cell cycle?
AInterphase and mitotic (M) phase
BOnly interphase
COnly mitosis
DGrowth phase only
ICSEClass 10 (ICSE)BiologyCh 1 · Topic 2
Practice and Revision - Cell Cycle, Cell Division and Cancer
Let us practise and revise what we learned about cell cycle, cell division and cancer. The cell cycle regulates cell growth and division, an
Core concept
The cell cycle consists of interphase (growth and DNA replication) and the mitotic (M) phase, where the cell actually divides.
How it works
Cancer occurs when cells lose control over their normal division cycle, dividing uncontrollably and forming tumours that can invade other tissues.
Why it matters
Carcinogens (cancer-causing agents) like tobacco smoke, UV radiation, and certain chemicals can damage DNA, triggering cancerous changes in cells.
Key detail
Understanding the cell cycle and cancer helps in developing treatments and preventive measures, like avoiding known carcinogens and regular health check-ups.
Exam highlight
Key diagram
Keywords worth remembering
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Quick notes
• Cell cycle: interphase + mitotic (M) phase.
• Interphase: growth and DNA replication.
• M phase: actual cell division.
• Cancer: uncontrolled cell division.
• Cancer forms tumours invading other tissues.
• Carcinogens damage DNA, trigger cancer.
• Examples: tobacco smoke, UV radiation.
• Understanding aids treatment and prevention.