AP BIOLOGY

Detailed explanation-1: -S phase is the period during which DNA replication occurs.

Detailed explanation-2: -The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA. In this way, the genetic material of a cell is doubled before it enters mitosis or meiosis, allowing there to be enough DNA to be split into daughter cells.

Detailed explanation-3: -Once! Interphase is the stage at which Dna replicates itself. During Mitosis, there is one interphase. During Meiosis, there is also one interphase.

Detailed explanation-4: -The interphase of a normal cell cycle will thus, consist of the G1 (Gap 1) phase, S (Synthesis) phase, and G2 (Gap 2) phase. The S phase is the phase in which replication of DNA will take place which is then followed by histones synthesis. This is the phase taking place between the G1 phase and G2 phase.

Detailed explanation-5: -The cells in the G2 phase have double the DNA content because the replicated DNA is synthesized and the cell contains double the genetic material. This is necessary before the mitotic division starts resulting in the formation of new cells.