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Question: Answered & Verified by Expert
Read the statement and choose the CORRECT option.

(i) Secretion of interferons is a physiological barrier of innate immunity.
(ii) T-lymphocytes are responsible for cell-mediated immunity.
(iii) Injection given against snake venom is a type of active immunization.
(iv) Antibodies produced during allergies reactions are of IgA type.
BiologyHuman Health and DiseasesNEET
Options:
  • A i and ii are correct
  • B ii and iv alone are correct
  • C iii alone is correct
  • D ii alone is correct
Solution:
2036 Upvotes Verified Answer
The correct answer is: ii alone is correct
(i) Secretion of interferons is a cytokine barrier of innate immunity. Interferons are proteins secreted by the virus-infected cells, which prevent the non-infected cells, from getting the infection.

(ii) T-lymphocytes are responsible for providing cell-mediated immunity. They do it through the synthesis of substances like cytokines.

(iii) Injection given against snake venom is a type of passive immunization. It contains preformed antibodies against the snake venom in it.

(iv) Antibodies which are produced during allergic reactions are of IgE type.

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