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Question

______ are antiviral substances formed by many vertebrate animal cells in response to viral infection.

A
Antivirins
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B
Antigens
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C
Virions
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D
Interferons
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Solution

The correct option is D Interferons
Interferons are the cytokines or the signalling proteins that are released by the virus-infected cells to signal the neighbouring cells. This allows healthy cells to speed up their anti-viral responses.
A. Antivirin is the synthetic antiviral drug against the flu virus.
B. Antigens are the proteins or carbohydrates of a pathogen that are recognised by the antibodies.
C. Virions are the entire virus particle, consisting of an outer protein shell called a capsid and an inner core of nucleic acid.
D. Interferons are antiviral substances formed by many vertebrate animal cells in response to viral infection.
Hence, the correct answer is 'Interferons'

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