Every living organism grows, repairs itself, and reproduces through the amazing process of cell division. This chapter, Cell Cycle, explains how a single cell prepares to divide, grows, and produces new cells. You will learn about mitosis, which helps in growth and repair, and meiosis, which is essential for producing gametes and ensuring genetic diversity.
We will also explore the differences between mitosis and meiosis, so you can understand how each process plays a unique role in life. By the end of this chapter, you will know how cells manage their life cycle and why this process is crucial for all living things.
📥 Download Chapter 4 Notes – Cell Cycle
Get Class 9 Biology Chapter 4 complete notes for the 2026 new syllabus, including:
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Cell Cycle
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Mitosis
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Meiosis
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Comparison between Mitosis and Meiosis
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Important MCQs, Short & Long Questions
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MCQs – Class 9 Biology Cell Cycle
1. In which phase of the cell cycle does growth occur in the cell?
a) M phase
b) G1 phase ✅
c) G2 phase
d) S phase
2. Which event is unique to meiosis but not mitosis?
a) DNA replication
b) Chromosome alignment
c) Crossing over ✅
d) Nuclear division
3. Which phase of the cell cycle takes about 90% of the total time?
a) G1 Phase
b) Mitosis
c) Interphase ✅
d) S Phase
4. Mitosis occurs in which type of cells?
a) Germ cells
b) Somatic cells ✅
c) Red blood cells
d) Prokaryotic cells
5. The main role of mitosis in growth is:
a) Production of gametes
b) Increase in cell size
c) Production of identical cells ✅
d) DNA mutation
6. Meiosis produces how many daughter cells?
a) 2
b) 3
c) 4 ✅
d) 5
7. What occurs during the G2 phase of the cell cycle?
a) Cell stops dividing permanently
b) DNA is copied
c) Preparation for mitosis and DNA damage check ✅
d) Formation of chromatin