A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 10 picograms of DNA per nucleus. Approximately how many picograms of DNA would be found in a nucleus at prophase of mitosis?
A) 5
B) 10
C) 20
D) 40

Question

Quizplus · Accepted Answer

During prophase of mitosis, the DNA has already been replicated during the S phase of interphase, doubling the amount of DNA in each cell. Therefore, if a cell has 10 picograms of DNA immediately following mitosis, it would have approximately 20 picograms at prophase of the next mitosis, after DNA replication has occurred.

A Group of Cells Is Assayed for DNA Content Immediately