Biology · Science General

Disease Causative Agents

2,258 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

Bacteriophages are

  1. viruses

  2. bacteria

  3. worms

  4. birds

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

Bacteriophages are viruses that specifically infect bacteria, using bacterial machinery to replicate themselves. They are not bacteria themselves, nor are they multicellular organisms like worms or birds.

Multiple choice

Cholera is _______________.

  1. a viral disease

  2. an airborne disease

  3. caused due to insect bite

  4. a waterborne disease

  5. a fungal disease

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

 It is an intestinal infection spread through polluted water.

Multiple choice

Communicable diseases are caused by ____________.

  1. allergies

  2. metabolic malfunction

  3. microorganisms

  4. inheritance

  5. addictions
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Communicable diseases are caused by microorganisms. Microorganisms help in spreading a disease, thus making it communicable.

Multiple choice

A proto-oncogene is described as DNA that

  1. causes cancer

  2. causes the vascularization of a tumour

  3. can be mutated into cancer causing DNA

  4. directly causes uncontrolled cellular growth
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A proto-oncogene is a normal body gene, which becomes an oncogene due to mutations or increased expression. They code for proteins controlling cell growth and differentiation.

Multiple choice

Which of the following diseases is caused by a virus?

  1. Malaria

  2. Tuberculosis

  3. AIDS

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

AIDS is caused by Human Immunodeficiency Virus (HIV), a retrovirus that attacks the immune system. Malaria is caused by Plasmodium (protozoa), tuberculosis by Mycobacterium (bacteria), and diphtheria by Corynebacterium (bacteria).