試題詳解

7. Which of the following statements regarding DNA packaging is not correct?
(A) Histone phosphorylation affects chromatin structure.
(B) Heterochromatin is a tightly packed form of DNA.
(C) Insulator provides a barrier that protects against the inactivating effect from heterochromatin.
(D) Centromeric DNA is normally in a heterochromatin state.
(E) During mitosis, securin holds sister chromatids together.