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What is a vaccine ? How do they act to p...

What is a vaccine ? How do they act to provide long term immunity to an individual who is vaccinated ?

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A vaccine is a biological preparation that improves immunity to a particular disease.
The vaccines also generte memory B and T cells that recognise the pathogen quickly on subsequent exposure and overwhelm the invaders with a massive production of antibodies.
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XII BOARD PREVIOUS YEAR PAPER ENGLISH-XII BOARDS-SECTION-B
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  5. 'Niche is a part of a habitat.'' Explain with the help of an example.

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  6. State the roles of AUG codon at 5' end UAG at 3' end of a certain m-RN...

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  7. Degenerate' and 'Universal' are salient features of a genetic code. Ex...

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  8. Both nucellus and endosperm have abundant reserve food materials. How ...

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  9. What is a vaccine ? How do they act to provide long term immunity to a...

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  10. Name the type of immunity the coloctrum provides to a newborn baby . W...

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  11. Write the binomials of two fungi and mention the profucts/bioactive mo...

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  12. Name a free-living and symbiotic bacterium that serve as bio-fertilize...

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  13. Name the type of immunity a baby is born with. How is it different fro...

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  14. 'Niche is a part of a habitat.'' Explain with the help of an example.

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  15. State the roles of AUG codon at 5' end UAG at 3' end of a certain m-RN...

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  16. Degenerate' and 'Universal' are salient features of a genetic code. Ex...

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  17. Both nucellus and endosperm have abundant reserve food materials. How ...

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  18. What is a vaccine ? How do they act to provide long term immunity to a...

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  19. Name the type of immunity the colostrum provides to a newborn baby . W...

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  20. Write the binomials of two fungi and mention the products/bioactive mo...

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