Which of the following statements is correct concerning native DNA?
A) The two strands are the same in base sequence.
B) The sugar-phosphate backbones contain the five carbon sugar ribulose.
C) The analysis A = G and C = T is expected.
D) The structure can be disrupted by high salt.
E) None of the above.

Question

Quizplus · Accepted Answer

Native DNA has two strands that are complementary, not identical, in base sequence (A pairs with T, and C pairs with G), which means A = T and C = G, not A = G and C = T as stated in option C. The sugar in the backbone of DNA is deoxyribose, not ribulose, making option B incorrect. High salt conditions typically stabilize the DNA double helix by shielding the negative charges on the phosphate backbone, making option D incorrect. Therefore, none of the provided statements are correct concerning native DNA.

Which of the Following Statements Is Correct Concerning Native DNA