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The DNA double helix is stabilized by which of the following interactions? (select all that apply) a. covalent bonds between the 3' end of one strand and the 5' end of the other. b. hydrogen bonding between the phosphate groups of the two DNA strands. c. complementary hydrogen bonding between purines and pyrimidine bases. d. hydrogen bonds between the riboses of each strand. e. base-stacking interactions between two adjacent bases in the same strand.

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Answer:

Hi, it is probably: c. complementary hydrogen bonding between purines and pyrimidine bases, and d. hydrogen bonds between the ribose's of each strand.

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