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 zoology allergy immunity related disorders and problems antibody production and vaccination biotechnology

Which of the following is caused by allergy?

  1. Leprosy

  2. Typhpid

  3. Asthma

  4. Tetanus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Asthma is a common long-term inflammatory disease of the airways of the lungs.
  • Symptoms include reversible airflow obstruction and easily triggered bronchospasms. 
  • Symptoms include episodes of wheezing, coughing, chest tightness, and shortness of breath. 
  • Asthma can be caused by Environmental factors including allergens, air pollution, and other environmental chemicals.
  •  Hence, Asthma is caused by an allergy.
  • So, the correct answer is 'Asthma'.
Multiple choice zoology allergy immunity related disorders and problems antibody production and vaccination biotechnology

Hay fever is caused by

  1. Hepatitis

  2. Dengue

  3. Allergy

  4. Helper T-cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hay fever (allergic rhinitis) is caused by grass pollen mostly but it can also be caused by tree pollen or weed pollen. Pollen is a fine powder enriched in protein released by plants as part of their reproductive cycle which can cause irritation in nose, eyes and throat. Symptoms of hay fever include sneezing, runny nose, itchy eyes etc. It is more common in spring and early fall. Hepatitis and dengue are viral diseases. Helper T-cells are immunity providing cells in the body

So, the correct answer is 'Allergy'

Multiple choice zoology allergy immunity related disorders and problems antibody production and vaccination biotechnology

Hay fever and asthma are

  1. Deficiency diseases

  2. Genetic diseases

  3. Organic diseases

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

Hay fever and asthma are the allergic reactions of the body to allergens. Allergy is the hypersensitivity of a person to some foreign substance coming in contact with the body. 

Hay fever is an allergic disease where there is swollen red eyes and running nose. The pollen grains are considered as allergens.
Asthma is the condition where the tissue surrounding the respiratory tube in the lungs swell up and compressors the tube and there is the difficulty in breathing.
Hence, the correct answer is 'Allergy diseases'

Multiple choice zoology molecular basis of inheritance the search for genetic material dna structure and replication molecular genetics

In Streptococcus pneumoniae

  1. Virulent form is smooth

  2. Virulent form is rough

  3. Nonvirulent form is capsulated

  4. All forms are rough
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In Streptococcus pneumoniae, the virulent strain possesses a polysaccharide capsule that makes the colonies appear smooth (S-strain), while the non-virulent strain lacks a capsule and appears rough (R-strain).

Multiple choice sexually transmitted diseases stds and infertility reproductive health reproduction biology

Which of the following represents the correct match of a sexually transmitted disease with its pathogen?

  1. Syphilis- Treponema pallidum

  2. Gonorrhoea-Entamoeba histolytica

  3. Urethritis-Bacillus anthracis

  4. Softsore-Bacillus brevis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Syphilis is a bacterial disease caused by Treponema pallidum. It is transmitted through sexual contact and from mother to foetus during pregnancy. In the first stage of this disease, painless ulcer or chancre appears on the genitals and swelling of lymph nodes occur.

Multiple choice sexually transmitted diseases stds and infertility reproductive health reproduction biology

Which of the following is not a sexually transmitted disease?

  1. Trichomoniasis

  2. Hepatitis B

  3. Chlamydiasis

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

Diseases or infections which are transmitted through sexual intercourse are collectively called sexually transmitted diseases or venereal diseases or reproductive tract infections. Gonorrhoea, syphilis, genital herpes, Chlamydiasis, Trichomoniasis, Hepatitis-B, AIDS are some of the STDs. Loiasis is a eye infection causedby loa loa worm. Thus option D is the correct answer.

Multiple choice sexually transmitted diseases stds and infertility reproductive health reproduction biology

Which of the following sexually transmitted diseases is most common in the world?

  1. Chlamydia

  2. Gonorrhea

  3. Herepes

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

Chlamydia is a common sexually transmitted infection, that can be passed on through sex without a condom with someone chlamydia (even if they don't have symptoms), or from a pregnant woman to her unborn baby. It can be prevented by using male or female condoms during sex. A simple urine test will show whether you have chlamydia. Chlamydia is easily treatable with antibiotics.

So the correct option is  'Chlamydia'

Multiple choice sexually transmitted diseases stds and infertility reproductive health reproduction biology

Which of the following is caused by the Haemophilus ducreyi?

  1. Chlamydiasis

  2. Chancroid

  3. Candidiasis

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

Haemophilus ducreyi is a fastidious gram-negative coccobacillus bacteria, which causes the sexually transmitted disease chancroid, a major cause of genital ulceration in developing countries, characterized by painful sores on the genitalia. 

So the correct option is  'chancroid'. 

Multiple choice sexually transmitted diseases stds and infertility reproductive health reproduction biology

Source of infection in diseases like tuberculosis, mumps and whooping cough is 

  1. Direct contact

  2. Droplets of saliva and cough

  3. Carrier organism

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

Tuberculosis, mumps and whooping cough are the contagious types of diseases. The diseases can spread through the droplets or the aerosols which are formed during coughing or sneezing. These aerosols contain the bacterium. The bacterium may enter the other person's body who is healthy and cause infection. 

Thus, the correct answer is option B. 

Multiple choice sexually transmitted diseases stds and infertility reproductive health reproduction biology

Which of the following are all sexually transmitted diseases?

  1. Hepatitis-B, AIDS, Haemophilia

  2. AIDS, Syphilis, Cholera

  3. Trichomoniasis, Malaria, HIV

  4. Gonorrhoea, Hepatitis-B, Chlamydia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The most common sexually transmitted diseases are HIV/AIDS, Chlamydia, Gonorrhea, Syphilis,Hepatitis Mycoplasma genitalium, Trichomoniasis, HPV, crabs/pubic mice.

So, the correct answer is 'Gonorrhea, Hepatitis-B, Chlamydia'.

Multiple choice sexually transmitted diseases stds and infertility reproductive health reproduction biology

Which of the following sexually transmitted disease is caused by yeast?

  1. Candidiasis

  2. Scabies

  3. Enterobiasis

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

A. Candidiasis- Candida albicans (Fungi)

B. Scabies- Sarcoptes scabiei (Ectoparasie)
C. Enterobiasis- Enterbius vermicularis (Nematode).
D. Syphilis- Treponema pallidium (Bacteria).
So, the correct answer is 'Candidiasis'.

Multiple choice sexually transmitted diseases stds and infertility reproductive health reproduction biology

Which one is correct regarding sexually transmitted diseases (STD)?

  1. Haemophilia is one of the STD

  2. Genital herpes and sickle cell anaemia are both STD

  3. Chances of a five years old boy contracting a STD are very little

  4. A person may contract syphilis by sharing milk with one already suffering from disease
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sexually transmitted infections are more common in 15-24 years age group. Gonorrhoea, syphilis, genital herpes, chlamydiasis, genital warts, trichomoniasis, hepatitis-B and AIDS are some of the common STDs. Haemophilia is sex-linked recessive disease, which show its transmission from unaffected carrier female to some of male progeny. Sickle cell anaemia is an autoimmune linked recessive trait in which both the partners are carrier for the gene

So, the correct answer is 'Chances of a five years old boy contracting a STD are very little',

Multiple choice sexually transmitted diseases stds and infertility reproductive health reproduction biology

Which is not a sexually transmitted disease?

  1. Genital warts

  2. Trichomoniasis

  3. Chlamydiasis

  4. Syphilis

  5. Myasthenia gravis
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Diseases or infections which are transmitted through sexual intercourse with infected persons are collectively called sexually transmitted diseases(STDs).

Examples- HIV leading AIDS, gonorrhoea, Syphilis, Chlamydiasis, Genital herpes, Genital warts, Hepatitis-B, Trichomonasis, Enterobiasis, Scabies, Candidiasis.
Myasthenia gravis is a chronic autoimmune neuromuscular disease that causes weakness in the skeletal muscles, which are responsible for breathing and moving parts of the body, including the arms and legs. In this condition, antibodies, which are proteins that normally attack foreign, harmful substances in the body, attack the neuromuscular junction.
So, the corrrect answer is 'Myasthenia gravis'.