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AP Biology Practice Questions
Original practice questions for the AP Biology (College Board), mixed across 1 topics with instant answers and explanations. Practise by topic below or take the timed mock test.
AP Biology mixed practice
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Q1.Which blood cells help in clotting?
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Answer: A — Platelets
Platelets (thrombocytes) form clots.
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Q2.Which part of the brain controls balance and coordination?
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Answer: C — Cerebellum
The cerebellum coordinates movement and balance.
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Q3.The powerhouse of the cell is the:
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Answer: C — Mitochondrion
Mitochondria produce ATP through cellular respiration.
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Q4.The universal blood donor group is:
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Answer: D — O−
O negative red cells lack A, B and Rh antigens.
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Q5.DNA is mainly found in the cell’s:
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Answer: A — Nucleus
Most DNA is in the nucleus (some in mitochondria and chloroplasts).
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Q6.Antibiotics are effective against:
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Answer: A — Bacteria
Antibiotics target bacteria, not viruses.
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Q7.Which blood vessels carry blood away from the heart?
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Answer: D — Arteries
Arteries carry blood away from the heart.
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Q8.Which organelle synthesises proteins?
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Answer: C — Ribosome
Ribosomes translate mRNA into protein.
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Q9.Who proposed the theory of evolution by natural selection?
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Answer: D — Charles Darwin
Darwin (with Wallace) proposed natural selection; ‘On the Origin of Species’ was published in 1859.
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Q10.Which part of the flower develops into the fruit?
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Answer: A — Ovary
After fertilisation the ovary develops into the fruit.
About AP Biology
AP Biology — conducted by College Board. College-level biology: cells, genetics, evolution, ecology and physiology.
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.
Practise by topic
- Biology questions — Learn structure → function links (mitochondria → ATP, nephron → filtration), the major hormones and their glands, and deficiency diseases.
- AP Biology mock test — 25 timed questions.
AP Biology practice topics
| Topic | Section | Question source |
|---|---|---|
| Biology | Science | Question bank |