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Tamil Nadu Board of Secondary EducationHSC Science कक्षा १२

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

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Why do you think it is not possible to produce vaccine against 'common cold'?

[7] Human Health and Diseases
Chapter: [7] Human Health and Diseases
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Colostrum provides ____________.

[8] Immunology
Chapter: [8] Immunology
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Paratope is an _________.

[8] Immunology
Chapter: [8] Immunology
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All are peripheral lymphoid organs except ____________.

[8] Immunology
Chapter: [8] Immunology
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Which is not a macrophage?

[8] Immunology
Chapter: [8] Immunology
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Cell mediated immunity is carried out by ____________ while humoral immunity is mainly carried out by ____________.

[8] Immunology
Chapter: [8] Immunology
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B Cells are activated by ____________.

[8] Immunology
Chapter: [8] Immunology
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In agglutination and precipitation reactions, the antigen is a ____________ and ____________ respectively.

[8] Immunology
Chapter: [8] Immunology
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B cells that produce and release large amounts of antibody are called ____________.

[8] Immunology
Chapter: [8] Immunology
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Raja is injured and got swelling. The swelling is due to the infection of tissue is an example of ____________.

[8] Immunology
Chapter: [8] Immunology
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How does saliva act in body defence?

[8] Immunology
Chapter: [8] Immunology
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How does immune system work?

[8] Immunology
Chapter: [8] Immunology
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List out chemical alarm signals produced during inflammation.

[8] Immunology
Chapter: [8] Immunology
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Where are B-cells and T-cells produced in the human body? How do they differ from each other? Mention any two differences.

[8] Immunology
Chapter: [8] Immunology
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Which of the following microorganism is used for production of citric acid in industries?

[9] Microbes in Human Welfare
Chapter: [9] Microbes in Human Welfare
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Which of the following pair is correctly matched for the product produced by them?

[9] Microbes in Human Welfare
Chapter: [9] Microbes in Human Welfare
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How is milk converted into curd? Explain the process of curd formation.

[9] Microbes in Human Welfare
Chapter: [9] Microbes in Human Welfare
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Write short notes on the following:

Brewer's yeast

[9] Microbes in Human Welfare
Chapter: [9] Microbes in Human Welfare
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List the advantages of biogas plants in rural areas.

[9] Microbes in Human Welfare
Chapter: [9] Microbes in Human Welfare
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Which of the following region has maximum biodiversity.

[12] Biodiversity and Its Conservation
Chapter: [12] Biodiversity and Its Conservation
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