Question

checkpoints occur between the stages of the cell cycle. if a cell does not meet certain criteria at the end of a stage, it will not move to the next stage. which of these occurs just before the cell enters g₂ stage of the cell cycle? dna replicates. the nuclear membrane disintegrates. centrioles form. the nucleolus divides.

Explanation:

The cell cycle has stages \(G_1\), \(S\), \(G_2\), and \(M\). In the \(S\) (synthesis) stage, DNA replication occurs. After \(S\) phase, the cell enters \(G_2\). The nuclear membrane disintegrates in \(M\) (mitosis) phase. Centriole formation and nucleolus division are not the immediate events before \(G_2\). DNA replication in \(S\) phase is the key event before \(G_2\).

Answer:

DNA replicates.