Which statement best explains the mechanism of action of monoclonal antibodies?
1. They alter the DNA of the tumor cells.
2. They prevent replication of the tumor cells.
3. They stimulate immune cell function.
4. They attack antigens on the surface of specific tumor cells.
Correct Answer: 4
Rationale 1: This is not the mechanism of action of monoclonal antibodies.
Rationale 2: This is not the mechanism of action of monoclonal antibodies.
Rationale 3: They are immunosuppressants.
Rationale 4: This is the correct mechanism of action of monoclonal antibodies.
Global Rationale: Monoclonal antibodies are a form of targeted therapy. They bind to antigens on the surface of tumor cells, marking the cell for destruction. They are not immunosuppressants and do not alter the DNA or prevent tumor cells from replicating.
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