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Form 4 Biology Exam Series: Complete NECTA Revision Guide (2026) |
📘 FORM 4 BIOLOGY EXAM SERIES (REAL STRUCTURE + ANSWERS)
(CSEE / NECTA format )
🧪 PAPER STRUCTURE (Very Important)
🅰️ SECTION A (16 MARKS)
- Multiple choice questions (i–x)
- Short answers
- 1 mark each
🅱️ SECTION B (54 MARKS)
- Short structured questions
- Definitions, explanations, diagrams
- 3–6 marks per question
🅲 SECTION C (30 MARKS)
- Essay questions
- Long explanations + diagrams
- Choose ANY 2 questions
📄 SAMPLE EXAM (WITH ANSWERS)
🅰️ SECTION A: OBJECTIVE QUESTIONS
1. The functional unit of the kidney is called?
A. Neuron
B. Nephron
C. Alveolus
D. Villus
✅ Answer: B (Nephron)
2. The process by which green plants make food is called?
A. Respiration
B. Photosynthesis
C. Transpiration
D. Digestion
✅ Answer: B (Photosynthesis)
3. Which blood cell fights diseases?
A. Red blood cell
B. Platelets
C. White blood cell
D. Plasma
✅ Answer: C (White blood cell)
4. Oxygen is transported in blood mainly by?
A. Plasma
B. Hemoglobin
C. Platelets
D. Water
✅ Answer: B (Hemoglobin)
🅱️ SECTION B: SHORT ANSWERS
1. Define osmosis. (2 marks)
✅ Answer:
Osmosis is the movement of water molecules from a region of higher water concentration to lower water concentration through a semi-permeable membrane.
2. State three functions of the liver. (3 marks)
✅ Answer:
- Produces bile
- Detoxifies poisons
- Stores glycogen
3. Explain two adaptations of the leaf for photosynthesis. (4 marks)
✅ Answer:
- Large surface area → absorbs more sunlight
- Contains many chloroplasts → trap light energy
4. Name two diseases caused by bacteria. (2 marks)
✅ Answer:
- Cholera
- Tuberculosis
🅲 SECTION C: ESSAY QUESTIONS
1. Explain the human digestive system. (15 marks)
✅ Answer points:
- Mouth: chewing + salivary amylase starts digestion
- Oesophagus: peristalsis moves food
- Stomach: hydrochloric acid + enzymes
- Small intestine: absorption of nutrients
- Large intestine: water absorption
- Rectum: storage of faeces
2. Describe the process of respiration in humans. (15 marks)
✅ Answer points:
- Inhalation brings oxygen into lungs
- Oxygen diffuses into blood
- Used in cells for energy release
- Produces carbon dioxide as waste
- Exhalation removes CO₂
📚 IMPORTANT BIOLOGY TOPICS (NECTA FOCUS)
✔ Cell structure & division
✔ Genetics & inheritance
✔ Human physiology (digestive, respiratory, circulatory)
✔ Ecology
✔ Reproduction in plants & animals
✔ Diseases & immunity
✔ Nutrition
📘 Real Education PDF Download
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Access all revision materials, notes, and downloadable PDFs below:
- 🧬 Biology Revision Booklet Form 1–4 (Full Notes)
- 📘 Form 1–4 Package Download PDF (Complete Revision)
- 📗 Form 2 Package Download PDF 2026
- 📕 Form 6 Package Download PDF 2026 (A-Level)
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