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KCET Biology Questions
Practise biology (science) for the Karnataka Common Entrance Test: 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 basic unit of heredity is the:
Show answer & explanation
Answer: B — Gene
Genes are segments of DNA that carry hereditary information.
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Q2.The functional unit of the kidney is the:
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Answer: D — Nephron
Each kidney has about a million nephrons that filter blood.
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Q3.Which blood cells help in clotting?
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Answer: D — Platelets
Platelets (thrombocytes) form clots.
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Q4.Which disease is caused by a deficiency of iodine?
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Answer: C — Goitre
Iodine deficiency causes goitre (thyroid enlargement).
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Q5.The powerhouse of the cell is the:
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Answer: A — Mitochondrion
Mitochondria produce ATP through cellular respiration.
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Q6.Photosynthesis takes place in the:
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Answer: A — Chloroplasts
Chloroplasts contain chlorophyll that captures light energy.
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Q7.DNA is mainly found in the cell’s:
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Answer: B — Nucleus
Most DNA is in the nucleus (some in mitochondria and chloroplasts).
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Q8.Which organelle synthesises proteins?
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Answer: D — Ribosome
Ribosomes translate mRNA into protein.
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Q9.Haemoglobin contains which metal?
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Answer: C — Iron
Iron in the haem group binds oxygen.
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Q10.Which part of the flower develops into the fruit?
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Answer: D — Ovary
After fertilisation the ovary develops into the fruit.
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 KCET
Karnataka Common Entrance Test — conducted by Karnataka Examinations Authority (KEA). State entrance for professional courses in Karnataka.
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.
KCET practice topics
| Topic | Section | Question source |
|---|---|---|
| Algebra | Mathematics | Calculated (new numbers every set) |
| Geometry & Mensuration | Mathematics | Calculated (new numbers every set) |
| Physics | Science | Calculated + question bank |
| Chemistry | Science | Calculated + question bank |
| Biology | Science | Question bank |