Biology MCQs (451–480) with Answers and Reasons are prepared for NEET, CUET, and Board examinations.
This set includes questions from Genetics, Evolution, Human Physiology, Biotechnology, and Ecology.
Regular practice of these MCQs improves conceptual clarity and exam readiness.
451. Which scientist is known as the father of genetics?
Correct Answer: C
Reason: Gregor Mendel discovered the laws of inheritance.
452. Which part of DNA carries genetic information?
Correct Answer: D
Reason: Nitrogenous bases store genetic information.
453. Which blood component transports oxygen?
Correct Answer: A
Reason: Red blood cells contain hemoglobin.
454. Which organ regulates blood sugar level?
Correct Answer: B
Reason: Pancreas secretes insulin and glucagon.
455. Which plant hormone causes fruit ripening?
Correct Answer: C
Reason: Ethylene promotes fruit ripening.
456. Which organelle is involved in lipid synthesis?
Correct Answer: B
Reason: Smooth endoplasmic reticulum synthesizes lipids.
457. Which gas is required for aerobic respiration?
Correct Answer: A
Reason: Oxygen is essential for aerobic respiration.
458. Which microorganism is used in sewage treatment?
Correct Answer: A
Reason: Bacteria decompose organic waste.
459. Which part of the brain controls involuntary actions?
Correct Answer: C
Reason: Medulla controls breathing and heartbeat.
460. Which process results in variation?
Correct Answer: B
Reason: Meiosis produces genetic variation.
461. Which blood vessel carries blood to the heart?
Correct Answer: A
Reason: Veins return blood to the heart.
462. Which enzyme digests proteins in the stomach?
Correct Answer: B
Reason: Pepsin digests proteins in acidic medium.
463. Which plant tissue transports water?
Correct Answer: A
Reason: Xylem conducts water and minerals.
464. Which disease is caused by deficiency of vitamin D?
Correct Answer: C
Reason: Vitamin D deficiency affects bone formation.
465. Which structure connects muscle to bone?
Correct Answer: B
Reason: Tendons attach muscles to bones.
466. Which microorganism causes tuberculosis?
Correct Answer: A
Reason: Tuberculosis is caused by bacteria.
467. Which blood vessel carries oxygenated blood?
Correct Answer: C
Reason: Arteries usually carry oxygenated blood.
468. Which plant tissue is responsible for growth?
Correct Answer: D
Reason: Meristematic tissues divide actively.
469. Which hormone stimulates milk production?
Correct Answer: B
Reason: Prolactin promotes milk synthesis.
470. Which gas is released during respiration?
Correct Answer: B
Reason: Carbon dioxide is a waste product of respiration.
471. Which organ stores bile?
Correct Answer: B
Reason: Gall bladder stores bile.
472. Which part of the brain maintains balance?
Correct Answer: C
Reason: Cerebellum controls balance and posture.
473. Which nutrient provides maximum energy?
Correct Answer: B
Reason: Fats yield the highest energy per gram.
474. Which structure connects bones to bones?
Correct Answer: A
Reason: Ligaments connect bones.
475. Which microorganism causes dengue?
Correct Answer: B
Reason: Dengue is caused by a virus.
476. Which blood vessel has the thickest wall?
Correct Answer: C
Reason: Arteries withstand high blood pressure.
477. Which plant tissue transports food?
Correct Answer: B
Reason: Phloem transports prepared food.
478. Which vitamin deficiency causes goitre?
Correct Answer: D
Reason: Iodine deficiency leads to goitre.
479. Which organ secretes growth hormone?
Correct Answer: C
Reason: Pituitary secretes growth hormone.
480. Which organelle is known as the suicide bag of the cell?
Correct Answer: B
Reason: Lysosomes contain powerful digestive enzymes.
Biology MCQs (451–480) FAQs
1. Are these MCQs strictly NCERT based?
Yes, all questions follow NCERT concepts.
2. Are these MCQs suitable for NEET?
Yes, they are designed for NEET, CUET, and board exams.
3. Do all questions include reasons?
Yes, every MCQ includes a clear reason.
4. How should students practice these MCQs?
Practice 25–30 MCQs daily for best results.
5. Is the next part the final set?
Yes, the next part (481–500) will be the final set.
Yes, all questions follow NCERT concepts.
2. Are these MCQs suitable for NEET?
Yes, they are designed for NEET, CUET, and board exams.
3. Do all questions include reasons?
Yes, every MCQ includes a clear reason.
4. How should students practice these MCQs?
Practice 25–30 MCQs daily for best results.
5. Is the next part the final set?
Yes, the next part (481–500) will be the final set.
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