MCQs - CBSE Solution of Class 12 Biology Health and Diseases

136 Incubation period of typhoid is

[1] 7 – 17 days

[2] 5 – 10 days

[3] 1 – 5 days

[4] 3 – 4 days

Answer: 7 – 17 days

137 Metastasis is connected with

[1] Benign tumour

[2] Malignant tumour

[3] Both 1 and 2

[4] Crown gall tumour

Answer: Malignant tumour

138 HIV infects

[1] Cytotoxic T-cells

[2] Cells of nervous system

[3] B-lymphocytes

[4] Helper T-cells

Answer: Helper T-cells

139 Western blot test is used for confirmation of

[1] Typhoid

[2] HIV

[3] Cancer

[4] Malaria

Answer: HIV

140 A bacterial disease is

[1] Leprosy

[2] Polio

[3] Chicken pox

[4] Influenza

Answer: Leprosy

141 Treatment of cancer is carried out by

[1] Radiation therapy

[2] Surgery

[3] Immunotherapy

[4] All of the above

Answer: All of the above

142 Pneumonia that infects lung alveoli is caused by

[1] Streptococcus species

[2] Plasmodium species

[3] Salmonella

[4] Haemophilus

Answer: Streptococcus species

143 Ringworm in humans is caused by

[1] Fungi

[2] Nematodes

[3] Viruses

[4] Bacteria

Answer: Fungi

144 Widal test is based on

[1] Serological interaction

[2] Sonography

[3] Endoscopy

[4] Angiography

Answer: Serological interaction

145 Most common type of Salmonella found in India is

[1] S. arizonae

[2] S. enteritidis

[3] S. typhi

[4] S. typhimurium

Answer: S. typhi

146 Kwashiorkor, a disorder of children is due to

[1] Protein/essential amino acid deficiency

[2] Carbohydrate deficiency

[3] Genetic problem

[4] Vitamin deficiency

Answer: Protein/essential amino acid deficiency

147 Diseases of the heart, joints and nervous system are called

[1] communicable diseases.

[2] degenerative diseases

[3] deficiency diseases

[4] allergies

Answer: degenerative diseases

148 Frost bite is caused by

[1] chemical agent

[2] biological agent

[3] nutrient agent

[4] physical agent

Answer: physical agent

149 Smoking may cause cancer of

[1] Lung

[2] Liver

[3] Skin

[4] Cervix

Answer: Lung

150 Malaria is caused by _____.

[1] Ascaris

[2] Plasmodium

[3] Entamoeba

[4] Trypanosoma

Answer: Plasmodium

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