The Cell Cycle is the series of events that take place in a cell leading to its division and duplication. It ensures that new cells are produced for growth, repair, and reproduction.

According to the biology class 9 new book pdf 2025 and the 2026 revised edition, the cell cycle has two main stages:

1. Interphase – when the cell grows and prepares for division.

2. Mitotic Phase (M Phase) – when the nucleus and cytoplasm divide to form two identical cells.

Our class 9 biology new book notes simplify these stages with labeled diagrams, summaries, and key points ideal for quick learning.

⚙️ Phases of the Cell Cycle

The biology class 9th chapter 4 new book 2026 pdf explains the process of cell division in detail. Let’s look at the main phases:

1. Interphase

The longest part of the cell cycle, where the cell:

• Grows in size

• Synthesizes proteins

• Duplicates its DNA

It includes G1, S, and G2 phases.

2. Mitosis

This phase divides the nucleus into two identical sets. It has four stages:

• Prophase: Chromosomes appear.

• Metaphase: Chromosomes align in the center.

• Anaphase: Chromatids separate to opposite poles.

• Telophase: Two nuclei form.

3. Cytokinesis

The cytoplasm divides, forming two new daughter cells.

Our 9th class biology solved exercises pdf covers these steps in question–answer form for easy revision.

📄 Solved Exercise with Answers

This section contains the biology class 9th chapter 4 solved exercise from the 2026 new book, including short questions, MCQs, and definitions.

✅ Example Questions:

• What is the cell cycle?

• Name the phases of mitosis.

• What is the difference between mitosis and meiosis?

All answers are based on the Punjab Textbook Board pattern and explained clearly for better understanding.

🧠 Important MCQs from Chapter 4 – Cell Cycle

The biology class 9 key book pdf download and our notes include dozens of important MCQs for board preparation:

1. Which phase of mitosis involves chromosome alignment?

2. What happens during cytokinesis?

3. In which phase does DNA replication occur?

4. Who discovered mitosis?

These MCQs are also available separately in the 9th class biology solved exercises pdf.

📘 Urdu & English Medium Notes

You can get biology class 9 new book pdf 2025 Urdu medium and the 2026 version for both mediums.

🔹 English Medium: Detailed diagrams and labeled explanations.
🔹 Urdu Medium: Simple and clear translations for easy learning.

Both versions include solved questions, short notes, and MCQs.

📥 Download Section

Here are your free downloadable files:

🔹 Download Biology Class 9th Chapter 4 New Book 2026 PDF (Free)
🔹 Download Urdu Medium Version (PDF)
🔹 Download 9th Class Biology Solved Exercises PDF
🔹 Download Biology Class 9 Key Book PDF
🔹 Download Class 9 Biology New Book 2025 (Old Edition)

All files are mobile-friendly and printable.

📚 Class 9 Biology New Book Notes (2026)

Our class 9 biology new book notes are written according to the new 2026 syllabus. Each chapter includes:

• Clear definitions and diagrams

• Solved exercises

• Important MCQs

• KIPS-style short and long questions

These notes are ideal for both school tests and board exams.

🧾 Why Download from Here?

✅ Based on Punjab Textbook Board 2026
✅ Includes MCQs, short & long questions
✅ Free PDF downloads
✅ Urdu & English medium versions
✅ Perfect for exam preparation

🧬 Conclusion

Chapter 4 – “The Cell Cycle” helps students understand how cells divide and ensure continuity of life. The biology class 9th chapter 4 new book 2026 pdf free download provides everything — from solved exercises to key notes — in one place.

Whether you’re using the biology class 9 new book pdf 2025 or the latest 2026 version, these resources will make your preparation easier and more effective.

👉 Click the links above to download all PDFs for free and start learning today!