12. DNA double strands can be separated from each other when the temperature exceeds 95 degree Celsius. What is the principal force that holds these two strands together?
(A) electrostatic attractions
(B) hydrogen bonds
(C) hydrophobic interactions
(D) Van der Waals attractions
(E) covalent bonds
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統計: 尚無統計資料
統計: 尚無統計資料