Human Biology — MCQs

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1. Which is the basic structural and functional unit of the human body?





2. Which blood cells are responsible for oxygen transport?





3. The largest organ of the human body is:





4. Which organ is called the “control center” of the body?





5. Which vitamin is essential for blood clotting?





6. Which blood group is called the universal donor?





7. Which system is responsible for transporting oxygen and nutrients in humans?





8. The functional unit of the kidney is:





9. Which part of the brain controls balance and coordination?





10. Which blood cells fight against infections?





11. Which organ is responsible for detoxifying harmful substances?





12. What is the normal pH of human blood?





13. Which hormone regulates blood sugar levels?





14. The largest bone in the human body is:





15. Which type of muscle is found in the heart?





16. Which organ stores bile?





17. Which part of the eye controls the amount of light entering?





18. The smallest bone in the human body is:





19. Which vitamin is produced in the skin with sunlight?





20. Which part of the digestive system absorbs most nutrients?





21. Which is the largest gland in the human body?





22. Which blood group is called the universal recipient?





23. The fluid that cushions the brain and spinal cord is:





24. Which organ produces insulin?





25. Which part of the human skeleton protects the brain?





26. Which part of the respiratory system is the site of gas exchange?





27. The human heart has how many chambers?





28. The number of chromosomes in human body cells is:





29. The master gland of the human body is:





30. Which part of the ear helps in maintaining balance?





31. Which blood cells are involved in clotting?





32. Which part of the human skeleton protects the heart and lungs?





33. Which organ is known as the “excretory organ”?





34. Which vitamin is necessary for good vision?





35. The main function of hemoglobin is:





36. Which part of the nervous system controls voluntary actions?





37. The longest part of the digestive system is:





38. The functional unit of the nervous system is:





39. Which gland regulates metabolism?





40. Which type of blood circulation carries blood between heart and lungs?





41. Which protein is responsible for the structure of hair and nails?





42. Which chamber of the heart pumps oxygenated blood to the body?





43. The process by which white blood cells engulf bacteria is called:





44. The bone that forms the backbone is called:





45. The organ that produces bile is:





46. Which muscle helps in breathing?





47. Which vitamin helps in the absorption of calcium?





48. The human body maintains a constant internal environment through:





49. Which part of the female reproductive system is the site of fertilization?





50. The human heart is made of which type of muscle?





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