Question

What are interferons? How do interferons check infection of new cells?


NCERT Class XII
Biology - Main Course Book

Chapter 8. Human Health and Diseases

Answer 1

a protein released by animal cells, usually in response to the entry of a virus, which has the property of inhibiting virus replication.

Answer 2

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Interferons are a group of natural proteins released by the host cell in the presence of any virus, tumour cells and parasites etc.

Interferons check infection of new cells as:

1. Interferons inhibit viral replication within the host cells.

2. Which in turn activates the natural killer cells and macrophages .

3. This increases the presentation of antigens to lymphocytes.

4. Now, these antigens multiply and remove the pathogen.

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Hope it helps!!!