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WAEC WASSCE Biology Questions
Practise biology (science) for the West African Senior School Certificate Examination: 10 multiple-choice questions, each with the correct answer and a worked explanation. Click an option to check it, or “New questions” for another set.
Biology practice
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Q1.The powerhouse of the cell is the:
Show answer & explanation
Answer: B — Mitochondrion
Mitochondria produce ATP through cellular respiration.
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Q2.In humans, the sex of a child is determined by the chromosome from the:
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Answer: C — Father
The father contributes either an X or a Y chromosome.
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Q3.Malaria is caused by:
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Answer: A — Plasmodium (a protozoan)
Plasmodium parasites are spread by female Anopheles mosquitoes.
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Q4.Which vitamin deficiency causes scurvy?
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Answer: C — Vitamin C
Scurvy results from a lack of vitamin C (ascorbic acid).
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Q5.Which blood vessels carry blood away from the heart?
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Answer: A — Arteries
Arteries carry blood away from the heart.
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Q6.Which of these is a vestigial organ in humans?
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Answer: D — Appendix
The vermiform appendix is considered vestigial.
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Q7.The green pigment in plants is:
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Answer: D — Chlorophyll
Chlorophyll absorbs red and blue light for photosynthesis.
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Q8.The number of chromosomes in a normal human body cell is:
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Answer: B — 46
Humans have 46 chromosomes (23 pairs).
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Q9.Antibiotics are effective against:
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Answer: B — Bacteria
Antibiotics target bacteria, not viruses.
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Q10.Which enzyme in saliva begins starch digestion?
Show answer & explanation
Answer: C — Salivary amylase (ptyalin)
Salivary amylase breaks starch into maltose.
How to approach biology questions
Learn structure → function links (mitochondria → ATP, nephron → filtration), the major hormones and their glands, and deficiency diseases. Diagrams help with cell organelles and organ systems.
About WAEC WASSCE
West African Senior School Certificate Examination — conducted by West African Examinations Council (WAEC). Senior school certificate exam taken in Nigeria, Ghana, Sierra Leone, Liberia and The Gambia.
Original practice questions written for this site in the style and difficulty of each exam’s syllabus. They are not past papers and the site is not affiliated with any exam body. Exam patterns, marking schemes and syllabi change — always check the latest official notification.
WAEC WASSCE practice topics
| Topic | Section | Question source |
|---|---|---|
| English Grammar | English | Question bank |
| Algebra | Mathematics | Calculated (new numbers every set) |
| Biology | Science | Question bank |
| Chemistry | Science | Calculated + question bank |