Studies of nucleosomes have shown that histones (except H1)exist in each nucleosome as two kinds of tetramers: one of 2 H2A molecules and 2 H2B molecules, and the other as 2 H3 and 2 H4 molecules. Which of the following is supported by this data?
A) DNA can wind itself around either of the two kinds of tetramers.
B) The two types of tetramers associate to form an octamer.
C) DNA has to associate with individual histones before they form tetramers.
D) Only H2A can form associations with DNA molecules.
E) The structure of H3 and H4 molecules is not basic like that of the other histones.

Question

Quizplus · Accepted Answer

The data suggests that the two types of histone tetramers associate to form an octamer, which is consistent with the known structure of a nucleosome where an octamer of histones is wrapped with DNA.

Studies of Nucleosomes Have Shown That Histones (Except H1)exist in Each