Railway Science (Biology-Deficiency and Diseases) (Part-II)

Total Questions: 16

11. What is the reason for the origin of organisms responsible for Kala Azar? [RRB Group D 18/09/2018 (Evening)]

Correct Answer: (a) Downward gamete fission
Solution:

Kala azar is caused by bites from female phlebotomine sandflies — the vector (or transmitter) of the leishmania parasite. In India ‘Leishmania donovani’ is the only parasite causing this disease.

12. Goitre is caused due to the deficiency of ________ . [RRB Group D 19/09/2018 (Afternoon)]

Correct Answer: (c) iodine
Solution:

Goitre: Abnormal enlargement of thyroid gland. Sources of Iodine - Seafood, Seaweed and Iodised salt. Deficiency and disease: Sodium - Hyponatremia and Hypotension. Iron - Anaemia. Vitamin D - Rickets, Osteoporosis and Osteopenia.

13. _____is not a sexually transmitted disease. [RRB Group D 22/09/2018 (Evening)]

Correct Answer: (a) Candidiasis
Solution:

Candidiasis : A fungal infection caused by a yeast called Candida. Examples of fungal infection - Vulvovaginitis, Cryptococcosis, Blastomycosis, Pneumocystis pneumonia. Examples of Sexually transmitted disease (STD) : Cervical cancer, Genital Herpes, Syphilis, Hepatitis- B, Trichomoniasis, Gonorrhea, Chlamydia, Acquired immunodeficiency syndrome (AIDS).

14. Which of the following worms causes elephantiasis? [RRB Group D 25/09/2018 (Morning)]

Correct Answer: (d) Filarial worms
Solution:

Wuchereria (W. bancrofti and W. malayi), the filarial worms cause a slowly developing chronic inflammation of the organs in which they live for many years, usually the lymphatic vessels of the lower limbs and the disease is called elephantiasis or filariasis.

15. The full form of HIV is: [RRB Group D 10/10/2018 (Evening)]

Correct Answer: (d) Human immunodeficiency virus
Solution:

It is the virus responsible for causing Acquired Immunodeficiency Syndrome (AIDS), a severe immunodeficiency disorder. It primarily targets the immune system, specifically CD4 T lymphocytes, weakening the body's ability to fight off infections and diseases.

16. What is Haemophilia? [RRB Group D 11/12/2018 (Afternoon)]

Correct Answer: (a) It is a disease caused by the absence of genes responsible for the factors that produce blood clotting.
Solution:

Haemophilia: This sex linked recessive hereditary disorder. In this disease, a single protein that is a part of the cascade of proteins involved in the clotting of blood is affected. Due to this, in an affected individual a simple cut will result in non-stop bleeding.