Students in a biology lab isolated cells in various phases of the cell cycle. A population of cells that have twice the DNA of G1 phase cells was most likely isolated from which of the following part of the cell cycle?
A) between the G1 and S phase
B) in the G2 phase
C) immediately after cytokinesis
D) at the beginning of the S phase

Question

Quizplus · Accepted Answer

Cells in the G2 phase have twice the DNA of G1 phase cells because DNA replication occurs during the S phase, making the G2 phase cells have a complete extra set of DNA in preparation for mitosis.

Students in a Biology Lab Isolated Cells in Various Phases