Question Detail
Question
When is the DNA content of a cell doubled? A. anaphase B. metaphase C. prophase D. interphase
Correct Answer
Option D is the correct answer.
Detailed Explanation
The DNA content of a cell doubles during the S phase of interphase when DNA replication takes place. After replication, the cell has twice the amount of DNA (from 2n to 4n in terms of DNA content, though chromosome number is still counted by centromeres).
Hint
The cell's genetic material is copied, doubling its amount.