You Have Isolated DNA from Three Different Cell Types of an Organism

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 13.3. Refer to the graph to answer the following
questions.

-Whether during mitosis or meiosis, sister chromatids are held together by proteins referred to as cohesions. Such molecules must have which of the following properties?

A) They must persist throughout the cell cycle.
B) They must be removed before meiosis can begin.
C) They must be removed before anaphase can occur.
D) They must reattach to chromosomes during G1.
E) They must be intact for nuclear envelope reformation.