Biology ยท 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

What is the term used to describe the ability of a microorganism to cause disease?

  1. Pathogenicity

  2. Virulence

  3. Transmissibility

  4. Incubation period
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pathogenicity is the term used to describe the ability of a microorganism to cause disease.

Multiple choice

What is the term used to describe the period of time between exposure to an infectious agent and the onset of symptoms?

  1. Incubation period

  2. Latent period

  3. Convalescent period

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

Incubation period is the term used to describe the period of time between exposure to an infectious agent and the onset of symptoms.

Multiple choice

What is the term used to describe the process of identifying and characterizing an infectious agent?

  1. Isolation

  2. Identification

  3. Characterization

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Isolation, identification, and characterization are all steps involved in the process of identifying and characterizing an infectious agent.

Multiple choice

Which of the following is NOT a type of bacterial infection?

  1. Pneumonia

  2. Tuberculosis

  3. Influenza

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

Influenza is a viral infection, not a bacterial infection.

Multiple choice

What is the role of the capsid in a virus?

  1. Protection

  2. Attachment

  3. Replication

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

The capsid is a protein coat that protects the viral genome.

Multiple choice

What is the primary cause of endocarditis?

  1. Viral infection

  2. Bacterial infection

  3. Fungal infection

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

Endocarditis is predominantly caused by bacterial infections, particularly those caused by Staphylococcus aureus and Streptococcus species.

Multiple choice

What are the three main modes of transmission for infectious diseases?

  1. Contact, droplet, and airborne

  2. Fomite, vector, and animal

  3. Waterborne, foodborne, and sexually transmitted

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The three main modes of transmission for infectious diseases are contact, droplet, and airborne; fomite, vector, and animal; and waterborne, foodborne, and sexually transmitted.

Multiple choice

Which of the following is an example of a contact-transmitted disease?

  1. Influenza

  2. Measles

  3. Hepatitis A

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

Hepatitis A is an example of a contact-transmitted disease, which is spread through direct contact with an infected person or through contact with contaminated objects.

Multiple choice

Which of the following is an example of a droplet-transmitted disease?

  1. Tuberculosis

  2. Meningitis

  3. Chickenpox

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

Mumps is an example of a droplet-transmitted disease, which is spread through respiratory droplets produced when an infected person coughs, sneezes, or talks.

Multiple choice

Which of the following is an example of an airborne-transmitted disease?

  1. Rubella

  2. Smallpox

  3. SARS

  4. COVID-19
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

COVID-19 is an example of an airborne-transmitted disease, which is spread through tiny respiratory droplets that can remain suspended in the air for long periods of time.

Multiple choice

Which type of microorganism is responsible for the common cold?

  1. Bacteria

  2. Viruses

  3. Fungi

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

The common cold is caused by a virus, specifically a rhinovirus.

Multiple choice

Which of the following is an example of a zoonotic disease?

  1. Influenza

  2. Malaria

  3. HIV/AIDS

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

Rabies is a zoonotic disease, which means that it can be transmitted from animals to humans. Influenza, malaria, and HIV/AIDS are not zoonotic diseases.

Multiple choice

What is the most common cause of meningitis?

  1. Bacteria

  2. Viruses

  3. Fungi

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

Bacterial meningitis is the most common type, caused by bacteria such as Streptococcus pneumoniae and Neisseria meningitidis.

Multiple choice

What is the most common cause of encephalitis?

  1. Viruses

  2. Bacteria

  3. Fungi

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

Viral encephalitis is the most common type, caused by viruses such as herpes simplex virus and Japanese encephalitis virus.

Multiple choice

Which sexually transmitted infection (STI) is the most common among incarcerated individuals?

  1. Chlamydia

  2. Gonorrhea

  3. Syphilis

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

Chlamydia is the most common STI among incarcerated individuals, followed by gonorrhea, syphilis, and hepatitis C.