Question

Natural killer cells are

• A. A type of lymphocyte and are a part of acquired immunity.
• B. A type of lymphocyte and are a part of innate immunity.
• C. A type of monocyte and are a part of acquired immunity.
• D. A type of monocyte and are a part of innate immunity.

Answer 1

Answer: (B)

Natural killer cells are large granular lymphocytes. They produce a chemical which produces pores in foreign cells and destroy them. They are a part of innate immunity and form cellular barriers. The other two types of lymphocytes are B and T lymphocytes, which are small and have no granules in their cytoplasm. They are a part of acquired immunity.