An oncogene called HER-2 causes many cases of breast and ovarian cancer. The drug Herceptin is an antibody that targets the HER-2 receptors on the cancer cells, cutting off the chemical signals that the cell needs to keep proliferating. It also marks the abnormal cells for destruction by the immune system. Which of the following statements best describes cancer caused by this oncogene?
A. Immunoglobulins are a promising but, as yet, undeveloped therapy for cancer.
B. All breast and ovarian cancers are linked to HER-2.
C. HER-2 receptors are antigens that can be attacked.
D. HER-2 receptors block signals for cell division.
E. The immune system has no way to recognize cancer cells or kill them.
Answer: C
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