Question

use the list below to answer the question.

cell observations

• chromatin has condensed into visible chromosomes
• nuclear envelope has disappeared
• nucleolus is no longer visible

a student looking through a microscope records observations about a cell.
which stage of the cell cycle has the student described?

∘ prophase
∘ anaphase
∘ interphase
∘ telophase

Explanation:

1. Recall the characteristics of each cell cycle stage:

• Prophase: Chromatin condenses into chromosomes, the nuclear envelope breaks down, and the nucleolus disappears.
• Anaphase: Sister chromatids separate and move to opposite poles.
• Interphase: The cell grows, replicates DNA, and prepares for division (chromatin is uncondensed, nuclear envelope and nucleolus are visible).
• Telophase: Chromosomes de - condense, nuclear envelope reforms, and nucleolus reappears.

1. Match the observations (chromatin condensed into chromosomes, nuclear envelope disappeared, nucleolus not visible) with prophase's characteristics.

Answer:

A. prophase