Risperdal and Seizures. FDA ALERT [04/2005] Risperdal is a type of medicine called an atypical antipsychotic. FDA has found that older patients treated with atypical antipsychotics for dementia had a higher chance for death than patients who did not take the medicine. This is not an approved use.
Introduction. Chromosomal DNA replication occurs during a phase of the cell cycle known as the S phase. Although the length of the S phase can vary significantly between different cell types, several absolute controls exist that dictate when and how many times in a cell cycle DNA replication can occur.
DNA replication occurs in the synthesis or S phase of the Cell Cycle. Every chromosome is copied with high fidelity in a process that involves a large number of enzymes.ll dividing cells must go through the process of DNA replication. Since cancer cells are often rapidly dividing, this phase of the cell cycle is the target of many of the chemotherapy agents that will be described in the 'Cancer Treatments' section.