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 social science public health and the government energy and health infectious diseases - transmission and prevention infectious diseases and how to prevent them

Which of the following diseases is showing an increasing trend in the recent past?

  1. Small Pox

  2. AIDS

  3. Tuberculosis

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

While diseases like Small Pox have been eradicated and Polio has been largely controlled, HIV/AIDS has historically shown an increasing trend in many regions over the past few decades.

Multiple choice social science public health and the government energy and health infectious diseases - transmission and prevention infectious diseases and how to prevent them

Which of the following disease has been totally eradicated as an epidemic?

  1. Cancer

  2. AIDS

  3. Blindness

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

Small Pox was declared globally eradicated by the World Health Organization in 1980, making it the only human disease to be completely eradicated.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Pneumonia is an example of 

  1. Communicable disease

  2. Non-communicable disease

  3. Epidemic disease

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

Pneumonia can cause by a virus, fungi, bacteria, etc. They can be transmitted from a contaminated person to a healthy person by sneezing, coughing, contaminated objects, air, etc. Thus it is considered as a communicable disease. So, the correct answer is option A.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Which of the following is an infectious disease?

  1. Coronary thrombosis

  2. Cancer

  3. Diabetes mellitus

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

  • Infectious diseases are those diseases which are caused by microorganisms like fungi, bacteria, virus, parasites. 
  • Diphtheria is an infectious disease caused by the bacterium Corynebacterium diphtheria. It affects the mucous membrane of the throat and upper respiratory tract. Coronary thrombosis is caused due to accumulation of cholesterol in the walls of arteries. 
  • Cancer is caused by mutation, radiation, etc. Diabetes mellitus is caused by insufficient production of insulin.

Thus, the correct answer is 'Diphtheria.'

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Select the infectious disease among the following.

  1. Diabetics

  2. Allergy

  3. Influenza

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

Infectious diseases are those that can spread from a diseased person to a healthy person. They are also called communicable diseases. 

A. Diabetes is a non-infectious disease. 
B. Allergy does not spread from an allergic to a non-allergic person.
C. Influenza is caused by a pathogen called Flu Virus. It is an infectious disease.
D. Arthritis is an auto-immune disease. It is non-infectious.
Hence, the correct answer is 'Influenza'

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Jaundice is a/an.

  1. Disease Caused by Protozoans

  2. Non-Communicable disease

  3. Infectious disease

  4. Bacterial disease in human
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Jaundice is a non-communicable infectious disease that is caused due to excessive secretion of bilirubin, that is not completely filtered by the blood. It is mostly caused due to Hepatitis virus, that infects the hepatic system.


So, the correct answer is 'Non-Communicable disease'.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Mad cow disease caused by a

  1. Bacterium

  2. Prion

  3. Worm

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

The causative agent of mad-cow disease is a prion. Bovine spongiform encephalopathy (BSE), commonly known as mad cow disease, is a fatal neurodegenerative disease or encephalopathy in cattle that causes a spongy degeneration in the brain and spinal cord. It is caused due to a prion. A prion is an infectious agent, specifically a protein in a misfolded form. The protein itself, whether in its misfolded or its correctly folded form, can be referred to as the prion protein (PrP). A protein as an infectious agent stands in contrast to all other known infectious agents, like viruses, bacteria, fungi, or parasitesall of which must contain nucleic acids.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Which is a air borne disease?

  1. A.I.D.S.

  2. Asthma

  3. Jacob syndrome

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

AIDS is caused by HIV virus and transmits sexually.
Jacob syndrome is characterized by an extra copy of Y chromosome in a male. Thalassemia is an inherited autosomal recessive blood disorder characterized by abnormal formation of hemoglobin. Whereas asthma is a respiratory condition caused by attacks of spasm in the bronchi of the lungs, causing difficulty in breathing. One of its cause is coming in contact with some air-borne allergens or exposure to some viral infections in infancy or in early childhood when the immune system is developing.
Thus, the correct answer is option B.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Severity of disease symptoms depends upon

  1. number of microbes

  2. target organ

  3. both of these

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

The severity of the disease manifestations depends on the number of microbes present in the body. Smaller is the number of microbes in the body, lesser are the symptoms of a disease. On the contrary, if microbe exists in large number in the body, disease can be severe and life-risking.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Which of the statements listed below is true about a common cold ?

  1. common cold is not contagious

  2. the common cold virus does not have its own RNA

  3. common cold usually takes two months to clear up

  4. the common cold virus can leave the body through the mucus of infected people.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Common cold spreads through the mucus of the infected people during sneezing and coughing.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Which of the following is a communicable disease?

  1. Common cold

  2. Chicken pox

  3. Cancer

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Communicable diseases are the disease that can spread from one person t another by any means of body or blood contact common cold can spread by sneezing in public without covering mouth and chicken pox spreads in the same manner as the cold by sneezing it can also spread through the fluid from the blisters.

So the correct option is D.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Which of the following is non-communicable disease?

  1. Allergy

  2. Malaria

  3. Diarrhoea

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

An allergy is a non-communicable disease and is a medical condition that makes a person feels unwell, when they eat or come in contact with a particular substance like itchy ears and eyes, eating of food like milk and egg. It occurs when the body’s immune system overreacts to a normally harmless substance.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Which of the following is a communicable disease?

  1. Phenylketoneuria

  2. Cancer

  3. Rabies

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

Communicable diseases spread from one person to another or from an animal to a person. The spread often happens via airborne viruses or bacteria, but also through blood or other bodily fluid. The terms infectious and contagious are also used to describe communicable disease.