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Cell Cycle and Cell Division

CBSE · Class 11 · Biology

Quick revision notes for Cell Cycle and Cell Division — CBSE Class 11 Biology. Key concepts, formulas, and definitions for last-minute revision.

151 questions76 flashcards5 concepts

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Key Topics to Revise

1

1. Cell Cycle and Interphase

  • Cell cycle has two basic phases: interphase and M phase.
  • Interphase is the phase between two successive M phases.
  • Interphase lasts more than 95% of the total cell cycle duration.
2

2. M Phase and Mitosis

  • M phase is the phase when actual cell division or mitosis occurs.
  • M phase begins with karyokinesis and usually ends with cytokinesis.
  • Mitosis is also called equational division because the chromosome number of the parent and progeny cells remains the same.
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3. Cytokinesis and Special Cases

  • Cytokinesis is the division of cytoplasm into two daughter cells after karyokinesis.
  • In animal cells, cytokinesis occurs by a furrow in the plasma membrane.
  • In plant cells, cytokinesis occurs by cell-plate formation.
4

4. Meiosis I and Meiosis II

  • Meiosis is a reduction division that reduces chromosome number by half.
  • Meiosis occurs in diploid cells destined to form gametes.
  • Meiosis involves two sequential divisions: meiosis I and meiosis II.

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Full Notes

Key Concepts

The cell cycle is the orderedInterphase is the phase between twoG1 phase is the interval betweenS phase is the synthesis phaseG2 phase is the stage

Frequently Asked Questions

What are the important topics in Cell Cycle and Cell Division for CBSE Class 11 Biology?
Cell Cycle and Cell Division covers several key topics that are frequently asked in CBSE Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Cell Cycle and Cell Division — CBSE Class 11 Biology?
Understand the core concepts first, then work through the 151 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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