NEET Botany Cell Cycle Chapter Notes

Official Full Course Cell Cycle Revision Material: NEET Botany Cell Cycle Chapter Notes

Review targeted revision notes for Full Course Cell Cycle with the NEET Botany Cell Cycle Chapter Notes. Built according to official educational guidelines for the 2026-27 academic year, these downloadable summaries for Cell Cycle support daily study and last-minute exam readiness.

Chapter-wise Concept Summaries: Cell Cycle

View or download the dedicated Cell Cycle revision resource below. Engaging with these structured concept notes daily ensures continuous academic progress and mastery of the 2026-27 curriculum for Cell Cycle.

Learning Objectives:-

The learner will be able to,

• Outline the cell cycle and different stages in cell division.

• Recognise the importance of mitosis in the production of genetically identical cells.

• Have an insight on the significant of mitosis and meiosis.

• Understand how a single cell divides to a whole organism.

• Familiarize the behaviour of chromosomes in plants and animal cells during meiosis.

• Know about crossing over and random assortment of homologous chromosomes and its importance.

Chapter Outline
 
7.1 History of cell division
7.2 Cell cycle
7.3 Cell Division
7.4 Difference between Mitosis and Meiosis
7.5 Mitogens
 
One of the most important features of the living cells is their power to grow and divide. New cells are formed by the division of pre-existing cells. Cells increase in number by cell division. The parent cell divides and passes on genetic material to the daughter cells.
 
NEET Botany Cell Cycle Chapter Notes
 
Edouard Van Beneden, a Belgian cytologist, embryologist and marine biologist. He was Professor of Zoology at the University of Liège. He contributed to cytogenetics by his works on the roundworm Ascaris. In his work he discovered how chromosomes organized meiosis (the production of gametes).
 
7.1 History of a Cell
 NEET-Botany-Cell-Cycle-Chapter-Notes 1
 
7.1.1 The Role of the Nucleus
 
As studied earlier, the nucleus is the organising centre of the cell. The information in the nucleus is contained within structures called chromosomes.
 
These uniquely:
 
• Control activities of the cell.
• Genetic information copied from cell to cell while the cell divides.
• Hereditary characters are passed on to new individuals when gametic cells fuse together in sexual reproduction.
 
7.1.2 Chromosomes
 
At the time when a nucleus divides, the chromosomes become compact and multicoiled structure. Only in this condensed state do the chromosomes become clearly visible in cells. All other times, the chromosomes are very long,thin, uncoiled threads. In this condition they give the stained nucleus the granular appearance. The granules are called chromatin.
 
The four important features of the chromosome are:
 
• The shape of the chromosome is specific: The long, thin, lengthy structured chromosome contains a short, constricted region called centromere. A centromere may occur anywhere along the chromosome, but it is always in the same position on any given chromosome.
 
• The number of chromosomes per species is fixed: for example the mouse has 40 chromosomes, the onion has 16 and humans have 46.
 
• Chromosomes occur in pairs: The chromosomes of a cell occur in pairs, called homologous pairs. One of each pair come originally from each parent. Example, human has 46
chromosomes, 23 coming originally from each parent in the process of sexual reproduction.
 
• Chromosomes are copied: Between nuclear divisions, whilst the chromosomes are uncoiled and cannot be seen, each chromosome is copied.The two identical structures formed are called chromatids.
 
7.1.3 Nuclear Divisions
 
There are two types of nuclear division,as mitosis and meiosis. In mitosis, the daughter cells formed will have the same number of chromosomes as the parent cell, typically diploid (2n) state. Mitosis is the nuclear division that occurs when cells grow or when cells need to be replaced and when organism reproduces asexually. In meiosis, the daughter cells contain half the number of chromosomes of the parent cell and is known as haploid state (n).
 
Whichever division takes place, it is normally followed by division of the cytoplasm to form separate cells, called as cytokinesis.
 
7.2 Cell Cycle
 
Definition: A series of events leading to the formation of new cell is known as cell cycle. The phenomenonal changes leading to formation of new population take place in the cell cycle. It was discovered by Prevost and Dumans (1824). The series of events include several phases.
 
7.2.1 Duration of Cell Cycle
 
Different kinds of cells have varied duration for cell cycle phases. Eukaryotic cell divides every 24 hours. The cell cycle is divided into mitosis and interphase. In cell cycle 95% is spent for interphase whereas the mitosis and cytokinesis last
only for an hour.
NEET-Botany-Cell-Cycle-Chapter-Notes 2
 
 
The different phases of cell cycle are as follows (Figure 7.1).
 
7.2.2 Interphase
 
Longest part of the cell cycle, but it is of extremely variable length. At first glance the nucleus appears to be resting but this is not the case at all. The chromosomes previously visible as thread like structure, have dispersed. Now they are actively involved in protein synthesis, at least for most of the interphase.
NEET-Botany-Cell-Cycle-Chapter-Notes 3
 

Free study material for Biology

Revision Notes and Key Concepts for Full Course Cell Cycle Cell Cycle

Key Concepts and Summary for Full Course Cell Cycle Cell Cycle

Explore reliable chapter overviews for Cell Cycle tailored for Full Course learners. Use these structured points to grasp difficult themes and ensure solid preparation for upcoming assessments.

NCERT-Aligned Chapter Summary and Notes

Each chapter summary is structured around standard NEET textbooks, allowing students to check their understanding and clarify complex ideas early in their revision.

Next Steps in Your Exam Preparation

Wrap up your chapter revision by testing your knowledge against standard question formats. Everything on our platform is provided free of charge.

FAQs

Where can I download the latest PDF for NEET Botany Cell Cycle Chapter Notes?

You can download the teacher prepared revision notes for NEET Botany Cell Cycle Chapter Notes from StudiesToday.com. These notes are designed as per 2026-27 academic session to help Full Course students get the best study material for Cell Cycle.

Are these Cell Cycle notes for Full Course based on the 2026 board exam pattern?

Yes, our NEET Botany Cell Cycle Chapter Notes include 50% competency-based questions with focus on core logic, keyword definitions, and the practical application of Cell Cycle principles which is important for getting more marks in 2026 NEET exams.

Do these Full Course notes cover all topic-wise concepts for Cell Cycle?

Yes, our NEET Botany Cell Cycle Chapter Notes provide a detailed, topic wise breakdown of the chapter. Fundamental definitions, complex numerical formulas and all topics of NEET syllabus in Full Course is covered.

How can I use NEET Botany Cell Cycle Chapter Notes for quick last-minute revision?

These notes for Cell Cycle are organized into bullet points and easy-to-read charts. By using NEET Botany Cell Cycle Chapter Notes, Full Course students fast revise formulas, key definitions before the exams.

Is there any registration required to download Full Course Cell Cycle notes?

No, all study resources on StudiesToday, including NEET Botany Cell Cycle Chapter Notes, are available for immediate free download. Full Course Cell Cycle study material is available in PDF and can be downloaded on mobile.