CBSE - Health and Diseases MCQs | CBSE Solution of Class 12 Biology Health and Diseases

61 Which of the following specimen is tested the most for the detection of carrier of typhoid?

[1] Urine

[2] Blood

[3] Faeces

[4] Sputum

Answer: Faeces

62 Chicken pox is caused by

[1] Varicella-Zoster Herpes virus

[2] Adeno virus

[3] SV 40 virus

[4] Bacteriophage T2

Answer: Varicella-Zoster Herpes virus

63 Which is spread by house fly

[1] Dengue fever

[2] Encephalitis

[3] Filariasis

[4] Typhoid

Answer: Typhoid

64 AZT is used in treatment of

[1] Malaria

[2] AIDS

[3] T.B.

[4] Kala-azar

Answer: AIDS

65 AIDS is characterized by sharp reduction in number of

[1] Helper T-cells

[2] Killer T-cells

[3] Suppressor T-cells

[4] B-lymphocytes

Answer: Helper T-cells

66 Small pox and rabies are caused by

[1] Bacterium

[2] Virus

[3] Protozoan

[4] Nematode

Answer: Virus

67 Pernicious anaemia is caused by the deficiency of vitamin

[1] B1/Thiamine

[2] B12/Cobalamine

[3] C/Ascorbic acid

[4] D/Calaciferol

Answer: B12/Cobalamine

68 One of the following is used for treatment of thyroid cancer

[1] U238

[2] Ra-224

[3] C-14

[4] I-131

Answer: I-131

69 Enzyme responsible for replication of HIV is

[1] RNA polymerase

[2] DNA ligase

[3] DNA polymerase

[4] Reverse transcriptase

Answer: Reverse transcriptase

70 Inactive cancer gene is called

[1] Transposon

[2] Proto-oncogene

[3] Tumour promoter gene

[4] Tumour suppressor gene

Answer: Proto-oncogene

71 Widal test is used for diagnosis of

[1] Malaria

[2] Cholera

[3] Typhoid

[4] Yellow fever

Answer: Typhoid

72 Dengue is caused by

[1] Female Aedes

[2] male Aedes

[3] Male Aneopheles

[4] Female Anopheles

Answer: Female Aedes

73 AIIDS is due to

[1] reduction in number of helper T-cells

[2] Reduction in number of killer T-cells

[3] Autoimmunity

[4] Non-production of interferons

Answer: reduction in number of helper T-cells

74 Which one of the followings is a water borne disease?

[1] Tuberculosis

[2] Malaria

[3] Cholera

[4] Chicken pox

Answer: Cholera

75 Immune deficiency syndrome could develop due to

[1] Defective liver

[2] Defective thymus

[3] AIDS virus

[4] Weak immune system

Answer: AIDS virus

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