the cell cycle is divided into two basic phases: Interphase and the M Phase (Mitosis) . The S phase (Synthesis phase) is the specific period during the interphase when DNA replication or synthesis takes place, resulting in the doubling of the DNA amount per cell (from 2C to 4C) while the chromosome number remains the same . Regarding the duration of these phases, the sources state that the interphase lasts more than 95% of the total duration of the cell cycle, meaning it is a long phase, whereas the actual cell division (M phase) lasts for only about an hour in a typical 24-hour human cell cycle . Mastering these specific meiotic and mitotic details from the NCERT textbooks is a high-priority strategy for medical aspirants, as they serve as the primary source for approximately 95% of NEET Biology questions .