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Tamil Nadu Board of Secondary EducationHSC Science इयत्ता १२

HSC Science इयत्ता १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions

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Malaria caused by Plasmodium is transmitted through ____________.

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A 30 year old woman has bleedy diarrhoea for the past 14 hours, which one of the following organisms is likely to cause this illness?

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Which of the following disease is spread through droplet nuclei?

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Exo-erythrocytic schizogony of Plasmodium takes place in ____________.

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The sporozoites of Plasmodium vivax are formed from ________.

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Poliomyelitis which causes infantile paralysis enters the body through ____________.

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The Athlete’s foot disease in human is caused by ____________.

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The sporozoite of the malarial parasite is present in _______.

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Haemozoin is ____________.

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Where do the following events in the life cycle of Plasmodium takes place?

a) Fertilization - _________

b) Development of gametocytes - __________ 

c) Release of sporozoites - ________

d) Schizogony - _________

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Match the pathogens with respective diseases caused by them and select the correct match using the codes given below.

Column I Column II
I. Leishmania donavani 1. Malaria
II. Wuchereria bancrofti 2. Amoebiasis
III. Trypanosoma gambiense 3. Kala - azar
IV. Entamoeba histolytica 4. Sleeping sickness
  5. Filariasis
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Complete the following table:

Diseases Causative agent Site of infection Incubation period
Mumps      
Chicken pox      
Dengue fever      
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List the causative agent, mode of transmission and symptoms for Diphtheria and Typhoid.

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Compare and contrast bacillary dysentery and amoebic dysentery.

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A patient was hospitalized with fever and chills. Merozoites were observed in her blood. What is your diagnosis?

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Write the scientific name of the filarial worm that causes filariasis.

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Write the symptoms of filariasis.

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How is this disease transmitted?

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Diseases Causative agent Symptoms
Ascariasis Ascaris  
  Trichophyton Appearance of dry, scaly lesions on various parts of the body
Typhoid   High fever, weakness, headache, stomach pain and constipation.
Pneumonia    
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What is Kala-azar?

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