Double-stranded DNA that contains a high G-C content requires a higher temperature in order to separate the two DNA strands. This is because
A) high G-C content makes the DNA less flexible.
B) G-C base pairing involves three hydrogen bonds, whereas A-T pairing involves only two.
C) Only the first and second answer choices are correct.
D) All of the above answer choices are correct.
E) DNA with a high G-C content forms a tighter double helix.
Ans: B) G-C base pairing involves three hydrogen bonds, whereas A-T pairing involves only two.
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