67. Which of the following statements correctly describes the role of type II topoisomerases?
(A) Type II topoisomerases break one DNA strand and change the linking number in increments of 1.
(B) Type II topoisomerases do not require ATP to function.
(C) Type II topoisomerases can introduce negative supercoils and relax both positive and negative supercoils.
(D) Type II topoisomerases are only involved in DNA replication.
(E) Type II topoisomerases cannot untangle catenanes.

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統計： A(3), B(3), C(31), D(0), E(0) #3429746

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拓樸異構酶使linking number改變，其中type I改變1個單位，而type II改變2個單位

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