Which phase of the cell cycle immediately follows the completion of DNA synthesis?

The correct answer is G2, as this phase of the cell cycle directly follows DNA synthesis, which occurs during the S phase. After DNA synthesis is complete, the cell enters the G2 phase, where it continues to grow and prepares for cell division. During G2, the cell checks the newly replicated DNA for any damage and ensures that it is ready to proceed to mitosis, the phase where the cell divides.

The G0 phase is a resting state where cells exit the cell cycle, G1 is the first gap phase that occurs before DNA synthesis, and prophase is a stage of mitosis where chromatin condenses into visible chromosomes. Understanding these phases is crucial to grasp how cells replicate and divide, maintaining proper function and genetic integrity.