Biology ยท 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

Which of the following diseases are caused by viruses?

  1. Chikungunya
  2. Kala-azar
  3. Enterobiasis
  4. Malaria
  5. Poliomyelitis
  6. Rabies
  7. Tuberculosis
  8. Enterobiasis
  9. Common cold

  1. 1, 2, 3 and 4

  2. 5, 6, 7 and 8

  3. 1, 5, 6 and 9

  4. 5, 7, 8 and 9

  5. 1, 2, 7 and 9
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chikungunya is a viral disease transmitted to humans by infected mosquitoes. Rabies is a viral disease that is spread most often from the bite of a rabid animal to another animal or to a human. Poliomyelitis is a highly contagious infectious disease caused poliovirus. Common cold is a mild viral infection of the nose, throat, sinuses and upper airways.

Multiple choice

Meningitis is the infection of the

  1. eyes

  2. skin

  3. brain

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

Meningitis is an inflammation of the meninges, which are the protective membranes covering the brain and spinal cord.

Multiple choice

Chicken pox is caused by _______.

  1. Dengue virus

  2. Varicella- zoster virus

  3. Rhino virus

  4. Corona virus

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

Chicken pox is a highly contagious disease caused by the varicella-zoster virus (VZV). Other options like Dengue, Rhino, and Corona viruses cause different illnesses such as dengue fever, the common cold, and COVID-19, respectively.

Multiple choice

Which of the following diseases is/are caused by viroids?

  1. Potato spindle tuber

  2. Cholera

  3. Tobacco mosaic disease

  4. All of the above

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

Potato spindle tuber disease is a classic example of a disease caused by a viroid. Cholera is caused by bacteria, and tobacco mosaic disease is caused by a virus.

Multiple choice

Oriental sore is caused by

  1. bacteria

  2. virus

  3. protozoan

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

Oriental sore (cutaneous leishmaniasis) is caused by the protozoan parasite Leishmania tropica.

Multiple choice

Cirrhosis is a disease that affects?

  1. Liver

  2. Heart

  3. Lungs

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cirrhosis is a late-stage scarring (fibrosis) of the liver caused by many forms of liver diseases and conditions, such as hepatitis and chronic alcohol abuse.

Multiple choice

Which of the following is a pair of diseases caused by Gram-positive bacteria?

  1. The clap and Typhoid fever

  2. Cholera and Botulism

  3. Typhoid and Listeriosis

  4. Gonorrhoea and Cholera

  5. Botulism and Listeriosis
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Yes, Botulism is a rare and potentially fatal paralytic illness caused by a toxin produced by the Clostridium botulinum (Gram-positive bacterium). Listeriosis is a bacterial infection most commonly caused by Listeria monocytogenes, (Gram-positive bacterium).

Multiple choice

Which of the following diseases is/are caused by viruses with single stranded RNA genome?

  1. Rabies
  2. Breakbone fever
  3. Infantile paralysis

  1. Only 1

  2. Only 2

  3. Only 3

  4. Only 2 and 3

  5. All of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Yes, it is correct. Rabies virus is a neurotropic virus that causes rabies in humans and animals. These viruses are enveloped and have a single stranded RNA genome with negative-sense. Dengue virus single stranded RNA virus of the family Flaviviridae. Poliovirus is composed of an RNA genome and a protein capsid. The genome is a single-stranded positive-sense RNA genome.

Multiple choice

Which one of the following sets of diseases is caused by different types of harmful viruses and mainly affects the human brain?

  1. Rabies, meningitis, encephalomyelitis

  2. Encephalomyelitis, meningitis, Alzheimers

  3. Serum hepatitis, meningitis, rabies

  4. Query fever, Alzheimers, Parkinsons

  5. Influenza, Parkinsons, Huntington's chorea
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct because this set of diseases is caused by the different types of harmful viruses and mainly affects the human brain.

Multiple choice

Which of the following diseases is caused by a DNA virus?

  1. Infectious hepatitis

  2. Serum hepatitis

  3. Hepatitis C

  4. Hepatitis D

  5. Hepatitis E
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Serum hepatitis or Hepatitis B is an infectious illness of the liver caused by the hepatitis B virus. Hepatitis B virus is a DNA virus and is enveloped. The DNA is only partly double stranded and forms a circle of around 3,200 bases.

Multiple choice

Which of the following are examples of human sexually transmitted infection caused by bacteria?

  1. The clap
  2. Trich
  3. Syphilis
  4. Chlamydia

  1. Only 1 and 2

  2. Only 1, 2 and 3

  3. Only 1, 3 and 4

  4. All of these

  5. Only 2, 3 and 4
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, it is the correct answer. The clap is a common human sexually transmitted infection caused by the bacterium Neisseria gonorrhoeae. Syphilis is a human sexually transmitted infection caused by bacterium Treponema pallidum. Chlamydia infection is a common sexually transmitted infection in humans caused by the bacterium Chlamydia trachomatis.