Question

Which innate immune system component uses MHC class I molecules directly in its defense strategy?

macrophages
neutrophils
NK cells
interferon

Answer 1

The correct answer is option - NK cells.

Explanation:

NK cells are a lymphocyte that is able to attack and kill the cancerous cells and viruses. These cells recognize infection caused by viruses mainly with the help of MHC I molecules present on the infected cell surface.

Major histocompatibility class or MHC I molecules are proteins that are present in almost all nucleated cells that deliver ideas about the cell's internal environment. After infection or becoming cancerous cell shows changed MHC class I molecules.

Thus, the correct answer is option - NK cells.