During which phase does RNA synthesis occur?

RNA synthesis occurs primarily during the postmitotic phase, also known as the G1 phase of the cell cycle. This is the stage that follows mitosis (M phase) and precedes DNA synthesis (S phase). During the G1 phase, the cell is metabolically active and engaged in producing various biomolecules necessary for growth and division. This includes the synthesis of RNA from DNA templates, which facilitates protein production essential for cellular function and eventual cell division.

In contrast, the resting phase refers to the G0 phase where cells are quiescent and not actively preparing to divide, leading to minimal RNA synthesis. The palliation phase is not a standard term associated with cell cycle phases but relates more to patient care in the context of managing symptoms rather than cellular processes. The mitosis phase is primarily involved in cell division, where the focus is on the separation of chromosomes rather than on the synthesis of RNA. Thus, the postmitotic phase is the correct context for RNA synthesis, as it is where the cell prepares for further DNA replication and division activities.