AP BIOLOGY

Detailed explanation-1: -S phase. In S phase, the cell synthesizes a complete copy of the DNA in its nucleus. It also duplicates a microtubule-organizing structure called the centrosome.

Detailed explanation-2: -During interphase, the cell grows and the nuclear DNA is duplicated. Interphase is followed by the mitotic phase.

Detailed explanation-3: -The cell cycle consists of four major phases: G1, S, G2, and M. The G1 phase stands for gap 1 and is when organelles replicate and the cell grows. The S phase stands for synthesis and is when DNA is replicated.

Detailed explanation-4: -During every cell division, a cell must duplicate its chromosomal DNA through a process called DNA replication. The duplicated DNA is then segregated into two “daughter” cells that inherit the same genetic information. This process is called chromosome segregation.

Detailed explanation-5: -S phase is the period during which DNA replication occurs.