Q. With regard to natural killer lymphocytes (Solved)
1. constitute less than 5% of blood lymphocytes
2. require opsonisation to enable their killing of cells
3. have a prime role in defense against parasites
4. require prior sensitisation to be effective
5. have an innate ability to lyse tumour cells and virally affected cells
- e. have an innate ability to lyse tumour cells and virally affected cells