In the section "investigating life: cutting off a tumor's supply lines in the war on cancer", the standard chemotherapy drug forms crosslinks between the two strands of dna in a chromosome. how is this effective in chemotherapy?
By doing this, it helps prevent tumors from multiplying which can slow down the development of cancer. Somehow, it prevents DNA replication, and this can help doctors treat the cancer before it spreads too much and possibly help cure it.