Private: DME Science Study Material
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Human Disease

Part 1

Q1. Which of the following diseases is caused by protozoa?

  1. Cholera
  2. Diphtheria
  3. Pneumonia
  4. Malaria
  5. None of the above

Answer: Option 4 : Malaria

Important Points

  • Malaria
    • Malaria is caused by a protozoan parasite called Plasmodium.
    • Carrier is a female anopheles mosquito.
    • Affects the spleen organ.

Additional Information

  • Cholera
    • Cholera is caused by the bacteria Vibrio cholerae.
    • Cause of disease is contaminated water/food.
  • Diphtheria
    • Diphtheria is caused by bacteria.
    • Bacteria name Corynebacterium diphtheriae.
    • Spread from person to person through sneezing and coughing.
  • Pneumonia
    • Pneumonia is an infection of the lungs caused by germs (fungi, bacteria, or viruses).
    • It causes cough, fever, chest pain, and the problem with respiration.

Q2. Which of the following is NOT caused by a virus?

  1. AIDS
  2. Arthritis
  3. Swine Flu
  4. Dengue Fever
  5. None of the above

Answer: Option 2 : Arthritis

  • Protozoa Diseases:
    • Amoebic dysentery by Entamoeba Histolytica Protozoa
    • Kala Azar by Leishmania donovani Protozoa
    • Malaria by Plasmodium parasite Protozoa
    • Sleeping sickness by Trypanosoma Brucei Protozoa
  • Bacteria Diseases:
    • Cholera Vibrio – Cholerae Bacteria
    • Leprosy – Mycobacterium Leprae Bacteria
    • Plague – Yersinia pestis Bacteria
    • Pneumonia – Streptococcus pneumonia Bacteria
    • Tetanus – Clostridium tetani Bacteria
    • Tuberculosis – Mycobacterium tuberculosis Bacteria
    • Typhoid – Salmonella typhi Bacteria
    • Whooping Cough – Bordetella pertussis Bacteria

Q3. Which among the following diseases is not caused by bacteria?

  1. Cholera
  2. Malaria
  3. Tetanus
  4. Anthrax
  5. None of the above

Answer: Option 2 : Malaria

  • Malaria is typically transmitted through the bite of an infected Anopheles mosquito.
  • Infected mosquitoes carry the Plasmodium parasite (Protozoa).
  • When this mosquito bites, the parasite is released into the bloodstream.
  • Different species of Plasmodium (P. vivax, P. malaria, and P. falciparum) are responsible for different types of malaria.


Q4. Which one of the following is a water borne disease?

  1. Smallpox
  2. malaria
  3. Cholera
  4. Tuberculosis
  5. None of the above

Answer (Detailed Solution Below)

Option 3 : Cholera

Waterborne disease

  • Water-borne diseases are the ones caused by pathogenic microbes spread via contaminated water.
  • Transmission of these pathogens occurs while using infected water for drinking, food preparation, and washing clothes, among others.
  • Many developing countries do not have proper water treatment plants, especially in rural areas. In some places, the availability of water is so scarce that people have neither the time nor the money to afford the water purifiers or other water treatment mechanisms.

Q5. Influenza disease is caused by which of the following? 

  1. Bacteria
  2. Virus
  3. Fungi
  4. Protozoan

Answer (Detailed Solution Below)

Option 2 : Virus

Influenza disease is caused by a Virus.


Caused By





Fungal Infection




Human Disease
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