Measurements of the amount of DNA per nucleus were taken on a large number of cells from a growing fungus. The measure of DNA levels ranged from 3 to 6 picograms per nucleus. One nucleus had 5 picograms of DNA. What stage of the cell cycle was the nucleus in? A) G₀ B) G₁ C) S D) G₂ E) M

Question

Quizplus · Accepted Answer

DNA is replicated during the S phase of interphase. In this scenario the range of DNA levels was from 3-6 picograms. This data tells the reader that a cell entering nuclear division would have six picograms of DNA and newly formed daughter cell would have three. If the cell in question had five picograms then it must have been in the process of DNA synthesis.

Measurements of the Amount of DNA Per Nucleus Were Taken