Final answer:
Antimetabolite and antitumor drugs are considered specific cell cycle chemotherapy agents because they target particular phases of the cell cycle, like DNA synthesis and mitosis, but can still affect normal rapidly dividing cells.
Step-by-step explanation:
Antimetabolite and antitumor drugs are examples of specific cell cycle chemotherapy agents. These agents target particular phases and processes of the cell cycle. For instance, antimetabolites like methotrexate inhibit the synthesis of pre-DNA molecule building blocks, which affects the S phase of cell division. Meanwhile, antitumor drugs such as Taxol interfere with the M phase by stabilizing microtubules and preventing cell mitosis. Despite the specificity, these drugs may still affect normal cells, particularly those that rapidly divide, which leads to common side effects such as hair loss and damage to the gastrointestinal lining.