Final answer:
Monoclonal antibodies are more effective than chemotherapy and radiotherapy in treating cancer because they have high affinity and specificity for cancer cells, reducing potential side effects. They can also trigger immune mechanisms to kill cancer cells.
Step-by-step explanation:
Monoclonal antibodies are more effective than chemotherapy and radiotherapy when treating cancer because they offer several advantages. Firstly, monoclonal antibodies have high affinity and specificity for cancer cells, which allows them to target and bind specifically to cancer cells while sparing normal cells. This reduces the potential side effects associated with radiation therapy and chemotherapy. Secondly, monoclonal antibodies can trigger various immune mechanisms to kill the cancer cells, such as blocking the function of targeted molecules, inducing apoptosis in cancer cells, and enhancing phagocytosis of cancer cells by macrophages.