Biology — Class 9 — Solved Notes & Q&A

Free solved chapter notes for Biology — Class 9 · All Pakistan BISE boards · ← all books

Diagrams descriptions, definitions and solved exercise Q&A for matric Biology. These notes are free for every student — read them online, no login needed. Each chapter below has a summary and solved questions & answers. Use the chapter list to jump straight to the chapter you need.

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Chapter 1: Introduction to Biology

Introduction to Biology (Biology) — key ideas solved and simplified for Class 9. Revise the Q&A below, then take the 4 chapter tests. Study with honesty — give each test in front of a parent or elder.

Solved questions & answers

Q: The powerhouse of the cell is:Answer: Mitochondria. This is a frequently asked board-exam question from Introduction to Biology.

Q: Photosynthesis occurs in the:Answer: Chloroplast. Link this answer to the chapter formula/definition and revise it daily.

Q: Normal human body temperature is:Answer: 37°C. This is a frequently asked board-exam question from Introduction to Biology.

Q: The functional unit of the kidney is:Answer: Nephron. Key concept from Introduction to Biology: remember the definition and one worked example.

Q: DNA carries:Answer: Genetic information. Link this answer to the chapter formula/definition and revise it daily.

Q: Oxygen in blood is carried by:Answer: Red blood cells. Link this answer to the chapter formula/definition and revise it daily.

Chapter 2: Cell Biology

Cell Biology (Biology) — key ideas solved and simplified for Class 9. Revise the Q&A below, then take the 4 chapter tests. Study with honesty — give each test in front of a parent or elder.

Solved questions & answers

Q: The powerhouse of the cell is:Answer: Mitochondria. Link this answer to the chapter formula/definition and revise it daily.

Q: Photosynthesis occurs in the:Answer: Chloroplast. This is a frequently asked board-exam question from Cell Biology.

Q: Normal human body temperature is:Answer: 37°C. This is a frequently asked board-exam question from Cell Biology.

Q: The functional unit of the kidney is:Answer: Nephron. Link this answer to the chapter formula/definition and revise it daily.

Q: DNA carries:Answer: Genetic information. This is a frequently asked board-exam question from Cell Biology.

Q: Oxygen in blood is carried by:Answer: Red blood cells. This is a frequently asked board-exam question from Cell Biology.

Chapter 3: Enzymes

Enzymes (Biology) — key ideas solved and simplified for Class 9. Revise the Q&A below, then take the 4 chapter tests. Study with honesty — give each test in front of a parent or elder.

Solved questions & answers

Q: The powerhouse of the cell is:Answer: Mitochondria. Link this answer to the chapter formula/definition and revise it daily.

Q: Photosynthesis occurs in the:Answer: Chloroplast. This is a frequently asked board-exam question from Enzymes.

Q: Normal human body temperature is:Answer: 37°C. This is a frequently asked board-exam question from Enzymes.

Q: The functional unit of the kidney is:Answer: Nephron. Link this answer to the chapter formula/definition and revise it daily.

Q: DNA carries:Answer: Genetic information. Key concept from Enzymes: remember the definition and one worked example.

Q: Oxygen in blood is carried by:Answer: Red blood cells. Link this answer to the chapter formula/definition and revise it daily.

Chapter 4: Bioenergetics

Bioenergetics (Biology) — key ideas solved and simplified for Class 9. Revise the Q&A below, then take the 4 chapter tests. Study with honesty — give each test in front of a parent or elder.

Solved questions & answers

Q: The powerhouse of the cell is:Answer: Mitochondria. This is a frequently asked board-exam question from Bioenergetics.

Q: Photosynthesis occurs in the:Answer: Chloroplast. Key concept from Bioenergetics: remember the definition and one worked example.

Q: Normal human body temperature is:Answer: 37°C. Key concept from Bioenergetics: remember the definition and one worked example.

Q: The functional unit of the kidney is:Answer: Nephron. Link this answer to the chapter formula/definition and revise it daily.

Q: DNA carries:Answer: Genetic information. This is a frequently asked board-exam question from Bioenergetics.

Q: Oxygen in blood is carried by:Answer: Red blood cells. Link this answer to the chapter formula/definition and revise it daily.

Chapter 5: Nutrition

Nutrition (Biology) — key ideas solved and simplified for Class 9. Revise the Q&A below, then take the 4 chapter tests. Study with honesty — give each test in front of a parent or elder.

Solved questions & answers

Q: The powerhouse of the cell is:Answer: Mitochondria. Key concept from Nutrition: remember the definition and one worked example.

Q: Photosynthesis occurs in the:Answer: Chloroplast. This is a frequently asked board-exam question from Nutrition.

Q: Normal human body temperature is:Answer: 37°C. This is a frequently asked board-exam question from Nutrition.

Q: The functional unit of the kidney is:Answer: Nephron. This is a frequently asked board-exam question from Nutrition.

Q: DNA carries:Answer: Genetic information. Key concept from Nutrition: remember the definition and one worked example.

Q: Oxygen in blood is carried by:Answer: Red blood cells. Link this answer to the chapter formula/definition and revise it daily.

Chapter 6: Transport

Transport (Biology) — key ideas solved and simplified for Class 9. Revise the Q&A below, then take the 4 chapter tests. Study with honesty — give each test in front of a parent or elder.

Solved questions & answers

Q: The powerhouse of the cell is:Answer: Mitochondria. This is a frequently asked board-exam question from Transport.

Q: Photosynthesis occurs in the:Answer: Chloroplast. This is a frequently asked board-exam question from Transport.

Q: Normal human body temperature is:Answer: 37°C. This is a frequently asked board-exam question from Transport.

Q: The functional unit of the kidney is:Answer: Nephron. Link this answer to the chapter formula/definition and revise it daily.

Q: DNA carries:Answer: Genetic information. This is a frequently asked board-exam question from Transport.

Q: Oxygen in blood is carried by:Answer: Red blood cells. Key concept from Transport: remember the definition and one worked example.

Chapter 7: Gaseous Exchange

Gaseous Exchange (Biology) — key ideas solved and simplified for Class 9. Revise the Q&A below, then take the 4 chapter tests. Study with honesty — give each test in front of a parent or elder.

Solved questions & answers

Q: The powerhouse of the cell is:Answer: Mitochondria. Link this answer to the chapter formula/definition and revise it daily.

Q: Photosynthesis occurs in the:Answer: Chloroplast. Key concept from Gaseous Exchange: remember the definition and one worked example.

Q: Normal human body temperature is:Answer: 37°C. Link this answer to the chapter formula/definition and revise it daily.

Q: The functional unit of the kidney is:Answer: Nephron. Key concept from Gaseous Exchange: remember the definition and one worked example.

Q: DNA carries:Answer: Genetic information. Link this answer to the chapter formula/definition and revise it daily.

Q: Oxygen in blood is carried by:Answer: Red blood cells. This is a frequently asked board-exam question from Gaseous Exchange.

Chapter 8: Homeostasis

Homeostasis (Biology) — key ideas solved and simplified for Class 9. Revise the Q&A below, then take the 4 chapter tests. Study with honesty — give each test in front of a parent or elder.

Solved questions & answers

Q: The powerhouse of the cell is:Answer: Mitochondria. Key concept from Homeostasis: remember the definition and one worked example.

Q: Photosynthesis occurs in the:Answer: Chloroplast. This is a frequently asked board-exam question from Homeostasis.

Q: Normal human body temperature is:Answer: 37°C. This is a frequently asked board-exam question from Homeostasis.

Q: The functional unit of the kidney is:Answer: Nephron. Link this answer to the chapter formula/definition and revise it daily.

Q: DNA carries:Answer: Genetic information. Key concept from Homeostasis: remember the definition and one worked example.

Q: Oxygen in blood is carried by:Answer: Red blood cells. Key concept from Homeostasis: remember the definition and one worked example.

Chapter 9: Coordination & Control

Coordination & Control (Biology) — key ideas solved and simplified for Class 9. Revise the Q&A below, then take the 4 chapter tests. Study with honesty — give each test in front of a parent or elder.

Solved questions & answers

Q: The powerhouse of the cell is:Answer: Mitochondria. Key concept from Coordination & Control: remember the definition and one worked example.

Q: Photosynthesis occurs in the:Answer: Chloroplast. Link this answer to the chapter formula/definition and revise it daily.

Q: Normal human body temperature is:Answer: 37°C. Link this answer to the chapter formula/definition and revise it daily.

Q: The functional unit of the kidney is:Answer: Nephron. Link this answer to the chapter formula/definition and revise it daily.

Q: DNA carries:Answer: Genetic information. This is a frequently asked board-exam question from Coordination & Control.

Q: Oxygen in blood is carried by:Answer: Red blood cells. Key concept from Coordination & Control: remember the definition and one worked example.

Chapter 10: Reproduction & Inheritance

Reproduction & Inheritance (Biology) — key ideas solved and simplified for Class 9. Revise the Q&A below, then take the 4 chapter tests. Study with honesty — give each test in front of a parent or elder.

Solved questions & answers

Q: The powerhouse of the cell is:Answer: Mitochondria. Key concept from Reproduction & Inheritance: remember the definition and one worked example.

Q: Photosynthesis occurs in the:Answer: Chloroplast. Link this answer to the chapter formula/definition and revise it daily.

Q: Normal human body temperature is:Answer: 37°C. Key concept from Reproduction & Inheritance: remember the definition and one worked example.

Q: The functional unit of the kidney is:Answer: Nephron. This is a frequently asked board-exam question from Reproduction & Inheritance.

Q: DNA carries:Answer: Genetic information. This is a frequently asked board-exam question from Reproduction & Inheritance.

Q: Oxygen in blood is carried by:Answer: Red blood cells. This is a frequently asked board-exam question from Reproduction & Inheritance.

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