Question

What is the primary function of natural killer cells in innate immunity?

Options

• They produce antibodies against bacterial antigens

• They secrete lysozyme to destroy bacteria

• They provide non-specific defence against viral infections and tumours

• They activate the complement cascade

Answer 1

Natural killer cells are important cellular components of innate immunity that provide non-specific defence against viral infections and tumour cells. They are part of the cellular barrier system and do not require prior sensitization to their targets.