DNA with a Higher G + C Content Is More

question 86

Multiple Choice

DNA with a higher G + C content is more stable at high temperatures than DNA with a high A + T content. Why?

• A) G and C fit together better than A and T.
• B) The two chains assume a parallel orientation when the A + T content is higher.
• C) The negative charge on the phosphates in the backbone is partially neutralized in DNA with a higher G + C content.
• D) The hydrophobic interactions between G and C are stronger than those between A and T.
• E) G and C form three hydrogen bonds and A and T, just two.

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