Scientists isolate cells in various phases of the cell cycle. They isolate a group of cells that have 1 1/2 times more DNA than G1 phase cells. What is the most likely part of the cell cycle from which these cells were isolated?

S phase.

Explanation:

The process of formation of the daughter cell by the division of parent cells is known as cell division. Two main types of the cell division are mitosis and meiosis.

The different phase of cell cycle are G1 phase, S phase, G2 phase and M phase. The isolated cells have 1 1/2 times more DNA than G1 phase cells, this indicates the S phase or synthesis phase in which the amount of DNA has been synthesized.

Thus, the answer is S phase.