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

Bacteriophage is a

  1. mycoplasma

  2. virus

  3. rickettisae

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

A bacteriophage is a type of virus that infects and replicates within bacteria.

Multiple choice

Plague is a

  1. bacterial disease

  2. viral disease

  3. mineral deficiency disease

  4. fungal disease
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Plague is an infectious disease caused by the bacterium Yersinia pestis, which is typically transmitted by fleas.

Multiple choice

UTI's are mainly caused by

  1. Mycobacterium leprae

  2. Shigella dysenteriae

  3. Treponema pallidum

  4. E.Coli
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Most urinary tract infections (UTIs) are caused by Gram negative bacteria, such as, E. coli. If there is an obstruction of the urethra, catheterization may be needed, but as a general rule, catheterization in cases of UTI is contraindicated, because it can actually introduce pathogens, and make the infection worse. Women tend to acquire more urethral and bladder infections than men, because the opening of the urethra, is closer to the anus.

Multiple choice

Piecemeal necrosis on liver biopsy is characteristic of

  1. chronic active hepatitis

  2. acute viral hepatitis

  3. both (1) and (2)

  4. neither (1) nor (2)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Piecemeal necrosis, also known as interface hepatitis, is a hallmark histological finding in chronic active hepatitis. It represents the destruction of hepatocytes at the limiting plate.

Multiple choice

Bacteria are the causative organisms for-

  1. Malaria

  2. AIDS

  3. Mumps

  4. Tuberculosis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tuberculosis is caused by the bacterium Mycobacterium tuberculosis. Malaria is caused by a protozoan (Plasmodium), AIDS by a virus (HIV), and Mumps by a virus.

Multiple choice

Hay fever and asthma belong to the category of

  1. deficiency diseases

  2. degenerative diseases

  3. hormonal diseases

  4. allergies
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hay fever and asthma are immune system responses to environmental triggers, which classifies them as allergies. They are not caused by nutrient deficiencies, hormonal imbalances, or degenerative cellular processes.