Biology · Science General

Disease Causative Agents

2,531 Questions

Disease causative agents questions test your understanding of viral, bacterial, and fungal infections, along with their transmission methods. These are common topics in general science sections of SSC and railways exams. Practice these questions to accurately identify disease pathogens and symptoms.

Viral diseasesFoodborne illnessesDisease transmission methodsExtrinsic disease factorsCommon pathogens

Disease Causative Agents Questions

Multiple choice

Typhoid, cholera are caused by ______.

  1. mosquitoes

  2. air-borne spread

  3. contaminated food and water

  4. silk moths
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Typhoid and cholera are caused by contaminated food and water.

Multiple choice

Syphilis can spread through

  1. air

  2. water

  3. sexual contact

  4. all of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Syphilis is a bacterial infection that's typically spread through sexual contact.It most commonly begins as a painless sore, usually in the area of your genitals, rectum, or mouth.The infection spreads from person to person through contact with these sores by the skin or mucous membranes.

Multiple choice

In which of the following ways do communicable diseases not spread?

  1. By sharing infected injection needles

  2. By shaking hands with infected persons

  3. By breathing of air containing microorganisms

  4. By taking infected food or water

  5. Through insect bites
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option as by shaking hands with infected persons, communicable diseases do not spread.

Multiple choice

Which of the following is not a physical disease?

  1. Diabetes

  2. Bronchitis

  3. Conjuctivitis

  4. Cholera

  5. Herpes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option. Cholera is not a physical disease. It is an infectious disease. It is caused due to the invasion of the body by infection causing organisms. Herpes is a virus disease caused by herpesvirus, affecting the skin or the nervous system.  

Multiple choice

Which of the following is not a waterborne disease?

  1. Cholera

  2. Polio

  3. Jaundice

  4. Asthma

  5. Typhoid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Asthma is a condition in which a person's airways become narrow and swollen, and produces extra mucus. This can make breathing difficult and trigger coughing, wheezing and shortness of breath. Pollutants in air trigger this disease.

Multiple choice

Which of the following is a helical virus?

  1. TMV

  2. Polio virus

  3. Herpes virus

  4. Vaccinia virus

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tobacco Mosaic Virus (TMV) is the classic example of a helical virus. Its RNA genome is surrounded by protein subunits arranged in a helical spiral around the nucleic acid, giving it a rod-like appearance.

Multiple choice

Of the thirty-six known species of Borrelia, twelve are known to cause Lyme disease. Which of the following is the Lyme disease causing species of Borrelia that was discovered in 2016 at Mayo Clinic in Rochester, Minnesota?

  1. Borrelia afzelii

  2. Borrelia burgdorferi

  3. Borrelia mayoni

  4. Borrelia garinii
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Borrelia mayoni was discovered in 2016. It causes Lyme disease. Illness caused by B. mayonii is similar to that caused by B. burgdorferi, but with a few possible differences. B. mayonii is associated with nausea and vomiting, diffuse rashes and a higher concentration of bacteria in the blood.

Multiple choice

Which of the following viruses was discovered by Dr. Bas E. Dutilh in 2014 at Radboud University Medical Centre in Netherlands that keeps us healthy by preying on bacteroides?

  1. Bacteriophage

  2. Crassphage

  3. T4 phage

  4. GB124 phage
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Dr. Bas E. Dutilh at Radboud University Medical Centre in Netherlands discovered crassphage. It keeps us healthy by preying on bacteroides. This virus infects bacteroides, which can be pathogens for humans.