Florida Biology EOC Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

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What key event occurs during the S phase of the cell cycle?

Cell division takes place

DNA is replicated

During the S phase of the cell cycle, DNA is replicated, which is a critical process for cell division. This phase ensures that each daughter cell receives an identical set of chromosomes when the cell undergoes division. The replication of DNA occurs to prepare for mitosis or meiosis, allowing genetic material to be accurately passed on to the next generation of cells.

In this phase, enzymes such as DNA polymerases are actively involved in unwinding the DNA double helix and synthesizing new strands of DNA complementary to the original. This process is essential for maintaining the integrity of the cell's genetic information as it prepares for division. Thus, recognizing the importance of the S phase as the stage where DNA replication occurs is fundamental to understanding how cells reproduce and ensure genetic continuity.

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Protein synthesis occurs

Cellular respiration happens

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