Question Detail
Question
When is the DNA content of a cell doubled?
Correct Answer
Option D is the correct answer.
Detailed Explanation
DNA replication (synthesis) occurs during the S phase of interphase. This is when the cell's DNA content is precisely doubled in preparation for cell division. In anaphase, metaphase, and prophase, the DNA is already replicated and is being sorted.
Hint
In which phase does the cell 'copy' its DNA?