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Ikiodiete George
- 2 Min Read
Jamb Scoring | Grading System For Physics, Biology & Chemistry: An Updated Guide For Cbt Exam (2025/2026)
As the 2025/2026 JAMB UTME approaches, students targeting science-related courses like Medicine, Engineering, Pharmacy, and Agricultural Science need to understand how JAMB scores science subjects such as Physics, Biology, and Chemistry.
This guide reveals how many questions are asked, how they’re scored, and how your total marks are calculated.
Overview of JAMB Scoring System
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The UTME exam consists of 4 subjects.
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Each subject carries a maximum of 100 marks.
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The total score is 400 marks.
If you're a science student, you're likely to write:
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Use of English (Compulsory)
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Biology
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Chemistry
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Physics or Mathematics
JAMB Physics Scoring Structure
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Total Number of Questions: 40
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Mark Per Question: 2.5
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Total Marks: 100
Sample Topic Distribution:
| Topic | Estimated No. of Questions |
|---|---|
| Mechanics | 8–10 |
| Optics | 5–6 |
| Electricity & Magnetism | 8–10 |
| Thermodynamics | 4–5 |
| Waves and Sound | 3–4 |
| Atomic and Nuclear Physics | 2–3 |
| Practical Reasoning | 2–3 |
JAMB Biology Scoring Structure
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Total Number of Questions: 40
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Mark Per Question: 2.5
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Total Marks: 100
Sample Topic Distribution:
| Topic | Estimated No. of Questions |
|---|---|
| Cell and Cell Functions | 4–6 |
| Genetics and Heredity | 3–5 |
| Ecology and Environment | 4–6 |
| Evolution and Adaptation | 2–3 |
| Classification of Living Organisms | 5–7 |
| Reproduction and Growth | 3–4 |
| Human Biology and Health | 4–5 |
| Plant Physiology | 3–4 |
JAMB Chemistry Scoring Structure
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Total Number of Questions: 40
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Mark Per Question: 2.5
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Total Marks: 100
Sample Topic Distribution:
| Topic | Estimated No. of Questions |
|---|---|
| Atomic Structure & Bonding | 5–6 |
| Periodic Table & Properties | 4–5 |
| Organic Chemistry | 6–8 |
| Stoichiometry & Calculations | 5–7 |
| Acids, Bases, and Salts | 3–5 |
| Gas Laws | 3–4 |
| Electrolysis & Redox | 3–5 |
How to Calculate Your JAMB Score for Science Subjects
Let’s say you answered:
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32 correct out of 40 in Physics → 32 × 2.5 = 80 marks
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28 correct in Biology → 28 × 2.5 = 70 marks
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34 correct in Chemistry → 34 × 2.5 = 85 marks
Then with 60 marks in English:
Your total JAMB score =
80 (Physics) + 70 (Biology) + 85 (Chemistry) + 60 (English) = 295/400
JAMB Grading Scale (2025/2026 Reference)
| Score Range | Grade Remark |
|---|---|
| 300 – 400 | Excellent |
| 250 – 299 | Very Good |
| 200 – 249 | Good |
| 180 – 199 | Fair |
| 150 – 179 | Weak |
| Below 150 | Poor (Risky) |
Tips to Score High in Physics, Biology & Chemistry
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Master Past Questions – JAMB repeats many topics and formats.
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Focus on Calculations – Especially in Physics and Chemistry.
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Use Diagrams – Biology questions often reference labeled structures.
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Revise Regularly – Spaced repetition improves retention.
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Time Yourself – Practice CBT under exam conditions.
Frequently Asked Questions (FAQs)
Q1: How many marks is each JAMB science question worth?
A: 2.5 marks per question. 40 questions × 2.5 = 100 marks.
Q2: Does JAMB do negative marking?
A: No. You won’t lose marks for wrong answers—attempt all.
Q3: Can I skip Physics and still study Medicine?
A: No. Most medical courses require Biology, Chemistry, and Physics.
Q4: Is the JAMB grading system the same every year?
A: The basic scoring system is consistent, but question difficulty may vary.
Final Thoughts
Knowing how JAMB scores Physics, Biology, and Chemistry gives you a strategic advantage. Each question carries 2.5 marks, and 40 questions can add up fast if you prepare well. Focus on high-yield topics, use CBT practice tools, and target at least 75% accuracy for competitive courses.
