26. Cancer is a group of diseases that primarily involves __________.
Correct Answer: B. Abnormal cell growth
Explanation: Cancer occurs when abnormal cells divide uncontrollably and can spread to other parts of the body, forming tumors.
27. Stroke occurs when there is a disruption in blood flow to the _______.
Correct Answer: A. Brain
Explanation: A stroke happens when the brain’s blood supply is blocked or reduced, depriving brain tissue of oxygen and nutrients.
28. Epilepsy is a disorder of the _______.
Correct Answer: A. Brain
Explanation: Epilepsy is a neurological disorder marked by recurrent seizures due to abnormal electrical activity in the brain.
29. Influenza (Flu) is a Human disease that primarily affects the ______.
Correct Answer: C. Lungs
Explanation: Influenza (flu) is a viral infection that attacks the respiratory system, especially the lungs, nose, and throat.
30. Hepatitis (A, B, C) primarily affects the _______.
Correct Answer: D. Liver
Explanation: Hepatitis is an inflammation of the liver, usually caused by viral infections (A, B, C), leading to liver damage.
31. Chronic Obstructive Pulmonary Disease (COPD) is a condition of the:
Correct Answer: A. Lungs
Explanation: COPD is a progressive lung disease that obstructs airflow and makes breathing difficult.
32. Gastroesophageal Reflux Disease primarily affects the:
Correct Answer: C. Esophagus
Explanation: GERD occurs when stomach acid flows back into the esophagus, causing irritation.
33. Rheumatoid arthritis is a disease of the:
Correct Answer: B. Joints
Explanation: Rheumatoid arthritis is an autoimmune disease that primarily affects the joints.
34. Multiple sclerosis (MS) is a disease of the:
Correct Answer: D. Central nervous system
Explanation: MS affects the central nervous system by damaging the protective covering of nerves.
35. Sickle cell anemia is caused by abnormal:
Correct Answer: B. Hemoglobin
Explanation: Sickle cell anemia is caused by abnormal hemoglobin that deforms red blood cells.
36. Celiac disease is a disease of the:
Correct Answer: A. Small intestine
Explanation: Celiac disease damages the lining of the small intestine due to gluten intolerance.
37. Cystic fibrosis primarily affects the:
Correct Answer: C. Lungs and digestive system
Explanation: Cystic fibrosis causes thick mucus buildup in the lungs and digestive system.
38. Psoriatic arthritis affects:
Correct Answer: A. Joints and skin
Explanation: Psoriatic arthritis is linked with psoriasis and affects both skin and joints.
39. Gout is caused by the buildup of:
Correct Answer: B. Uric acid crystals
Explanation: Gout results from high uric acid levels forming crystals in the joints.
40. Anemia is caused by a deficiency of:
Correct Answer: A. Red blood cells or hemoglobin
Explanation: Anemia reduces oxygen transport due to low red blood cells or hemoglobin.
41. Bipolar Disorder is a mental health condition characterized by:
Correct Answer: D. Extreme mood swings
Explanation: Bipolar disorder causes extreme changes in mood, energy, and behavior.
42. Schizophrenia is a mental health disorder that primarily affects:
Correct Answer: B. Thought processes and perception
Explanation: Schizophrenia affects thinking, emotions, and perception of reality.
43. CKD primarily affects the:
Correct Answer: C. Kidneys
Explanation: Chronic Kidney Disease affects the kidneys’ ability to filter blood.
44. Malnutrition is caused by a deficiency of:
Correct Answer: C. Essential nutrients
Explanation: Malnutrition results from lack of essential nutrients needed by the body.
45. Cholera is caused by:
Correct Answer: C. Bacteria
Explanation: Cholera is caused by bacteria found in contaminated food or water.
46. Tuberculosis (TB) is a human disease caused by a:
Correct Answer: B. Bacterium
Explanation: Tuberculosis is caused by a bacterium that mainly attacks the lungs.
47. The bacteria that causes TB is called:
Correct Answer: C. Mycobacterium tuberculosis
Explanation: TB is caused by the bacterium Mycobacterium tuberculosis.
48. Smallpox is caused by a:
Correct Answer: C. Virus
Explanation: Smallpox was a viral disease eliminated through vaccination.
49. The virus that causes Smallpox is called:
Correct Answer: A. Variola
Explanation: Smallpox was caused by the Variola virus.
50. Smallpox has been eradicated globally due to:
Correct Answer: C. Widespread vaccination efforts
Explanation: Global vaccination campaigns led to the eradication of smallpox.
51. Malaria is a human disease caused by:
Correct Answer: C. Protozoa
Explanation: Malaria is caused by protozoan parasites transmitted by mosquitoes.
52. The carrier of the malaria-causing parasite is the ______.
Correct Answer: D. Female Anopheles mosquito
Explanation: Malaria spreads through the bite of the female Anopheles mosquito.
MCQs related to human diseases frequently appear in competitive exams as a part of general Science section. These questions are designed to assess a candidate’s understanding of basic human physiology and their awareness of the human body. It’s not just about knowing the environment or current affairs — candidates are also tested on how well they understand themselves: what organs perform which functions, what diseases can affect those functions, and how the body responds to various conditions.
This knowledge reflects a candidate’s critical thinking and awareness of both internal and external factors affecting human life. Recognizing this importance, we have prepared a comprehensive list of Human Diseases MCQs that will prove helpful in your exam preparation. The list is provided below: