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.
The cell cycle.The cell cycle includes the S phase (during which DNA synthesis occurs), the M phase (during which mitosis occurs) and two gap phases (G1 and G2). Mitosis is divided into five stages: prophase, prometaphase, metaphase, anaphase and telophase.