Which of the Following Contributes to the Stability of the DNA

question 21

Multiple Choice

Which of the following contributes to the stability of the DNA double helix?

• A)hydrophobic interactions between aromatic bases at the center of the double helix
• B)hydrogen bonding between the phosphate and sugar groups in the backbone of the double helix
• C)covalent bonding between complementary purine and pyrimidine bases.
• D)ionic bonds between the negatively charged phosphate groups and the positively charged pyrimidine bases.
• E)hydrophobic interactions between aromatic bases at the center of the double helix and ionic bonds between the negatively charged phosphate groups and the positively charged pyrimidine bases

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