Class 11 Biology — Chapter 10: CELL CYCLE AND CELL DIVISION

Chapter 10: CELL CYCLE AND CELL DIVISION is a chapter in Class 11 Biology (NCERT), part of the CBSE NCERT curriculum followed by over 25 million students across India. This chapter covers 7 topics including Introduction to the Cell Cycle, Phases of the Eukaryotic Cell Cycle, Interphase and its Stages (G1, S, G2). BrainWeave provides free AI-powered explanations — by voice or text, in Hindi or English — with no signup required.

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What you'll learn

▸Introduction to the Cell CycleCore concept

cell cyclecell divisionDNA replicationcell growth
▸Phases of the Eukaryotic Cell CycleCore concept

InterphaseM Phasekaryokinesiscytokinesis
▸Interphase and its Stages (G1, S, G2)Core concept

G1 phaseS phaseG2 phaseDNA synthesis
▸The Quiescent Stage (G0)

G0 phasequiescent stagecell proliferationinactive stage
▸ProphaseCore concept

Prophasechromatin condensationsister chromatidsmitotic apparatus
▸MetaphaseCore concept

Metaphasemetaphase platekinetochorespindle fibers
▸AnaphaseCore concept

Anaphasesister chromatidsdaughter chromosomescentromere splitting

Chapter Summary

Understand that the cell cycle is the ordered sequence of events, including cell growth, DNA replication, and cell division, that allows a single cell to produce two daughter cells. This process is fundamental for the growth, repair, and reproduction of all living organisms.

Identify and differentiate between the two main phases of the cell cycle: Interphase (the period of growth and DNA synthesis) and the M Phase (the period of actual cell division). Recognize that Interphase constitutes the vast majority of the cell cycle's duration.

Describe the specific events occurring in the three sub-phases of Interphase. G1 phase involves metabolic activity and growth. S phase is when DNA synthesis (replication) occurs, doubling the DNA content from 2C to 4C without changing the chromosome number (2n). G2 phase involves further growth and protein synthesis in preparation for mitosis.

Understand the G0 phase as an inactive, non-dividing stage that cells can enter from the G1 phase. Cells in G0 are metabolically active but do not proliferate unless signaled to re-enter the cell cycle.

Recognize the key events of Prophase, the first stage of mitosis. This includes the condensation of chromatin into visible chromosomes (each with two sister chromatids), the movement of centrosomes to opposite poles, and the formation of the mitotic spindle.

Characterize Metaphase by the complete disintegration of the nuclear envelope and the alignment of all chromosomes at the cell's equator, forming the metaphase plate. Understand the role of kinetochores in attaching chromosomes to the spindle fibers.

Identify Anaphase as the stage where centromeres split, and sister chromatids separate. These newly separated chromatids, now called daughter chromosomes, migrate to opposite poles of the cell.

Practice Questions from this Chapter

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Explain DNA replication simply. Get Solution →
Describe quiescent cell states. Get Solution →
Illustrate cell cycle phases. Get Solution →
What is the sequence of events by which a cell duplicates its genome, synthesises other constituents, and eventually divides into two daughter cells called? Get Solution →
The two basic phases of the cell cycle are the M Phase and which other phase? Get Solution →
During which phase of the cell cycle does DNA synthesis or replication take place? Get Solution →
What is the term for the division of the nucleus during the M phase? Get Solution →
Which of the following is the first stage of karyokinesis in mitosis? Get Solution →

Did you know?

💡 A human body replaces about 50 million cells every second.
💡 Your entire skin renews itself completely through cell division in roughly a month.
💡 Some brain cells, like neurons, can live your entire lifetime without dividing.
💡 The tiniest bacteria can divide so fast they double in just twenty minutes.
💡 All of your chromosomes from one cell would stretch over two meters long.

Frequently Asked Questions

How many topics are covered in this chapter?

This chapter covers 7 key topics: Introduction to the Cell Cycle, Phases of the Eukaryotic Cell Cycle, Interphase and its Stages (G1, S, G2), The Quiescent Stage (G0), Prophase, and more. The BrainWeave AI tutor explains each one with examples.

Is Chapter 10: CELL CYCLE AND CELL DIVISION important for board exams?

Class 11 is a foundation year. Mastering this chapter now will help you build strong fundamentals for the higher classes.

Can I get NCERT solutions for this chapter in Hindi?

Yes. BrainWeave's AI tutor supports Hindi, English, and Hinglish for both voice and text chat. Just ask your question in your preferred language.

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Related Chapters

Chapter 9: BIOMOLECULES

Chapter 11: Photosynthesis in Higher Plants

Chapter 3: PLANT KINGDOM

Chapter 4: ANIMAL KINGDOM

Chapter 1: The Living World

Chapter 8: Cell: The Unit of Life

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