Question

the phase labeled 2 on the figure is the ______.

• g2 phase
• prophase

Explanation:

Identify the diagram components

The diagram illustrates the eukaryotic cell cycle, divided into Interphase and M Phase (Cell division). Interphase is further divided into three distinct sub-phases labeled chronologically as 1, 2, and 3.

Analyze the labeled phases

• Phase 1 occurs immediately after cell division and contains the \(G_1\) checkpoint and \(G_0\) phase exit, representing the \(G_1\) phase (Gap 1).
• Phase 2 is characterized by the label "DNA replicated" with an arrow showing DNA duplication, which defines the Synthesis phase.
• Phase 3 follows DNA replication and precedes mitosis, representing the \(G_2\) phase (Gap 2).

Determine the correct label for 2

Since phase 2 is the period where DNA replication occurs, it is the S phase (Synthesis phase).

Match with the options

Although the visible options are partially cut off, the phase labeled 2 is the S phase.

Answer:

• S phase (Correct answer)
• \(G_2\) phase
• prophase