Figure 10.3
-You have isolated DNA from three different cell types of an organism, determined the relative DNA content for each type, and plotted the results on the graph shown in Figure 10.3. Which sample(s) of DNA might be from a skin cell arrested in G0 of the cell cycle?

Question

Quizplus · Accepted Answer

Sample I has the lowest relative DNA content, suggesting that it is from a cell type that is not currently undergoing DNA replication (i.e. not in S phase) or actively dividing (i.e. not in G1 or G2). Since skin cells can enter a non-dividing state called G0, it is possible that Sample I is from a skin cell arrested in G0. Samples II and III have higher relative DNA content, indicating that they are likely from cell types that are either actively replicating or have recently replicated their DNA.

Figure 10.3 -You Have Isolated DNA from Three Different Cell Types of Types