Final answer:
Cisplatin and doxorubicin both inhibit DNA synthesis.
Step-by-step explanation:
Cisplatin and doxorubicin are both chemotherapeutic drugs that work through different mechanisms.
Cisplatin inhibits DNA synthesis by binding to DNA and causing cross-links, which prevent DNA from being replicated.
Doxorubicin, on the other hand, intercalates with DNA and inhibits the function of topoisomerase II, an enzyme necessary for DNA replication and repair.
Therefore, the common mechanism among cisplatin and doxorubicin is inhibition of DNA synthesis.