How does DNA stability differ between RNA and DNA under basic conditions?

How does DNA stability differ between RNA and DNA under basic conditions?

• A. DNA is less stable due to its ribose sugars
• B. RNA is hydrolyzed while DNA remains stable due to its 2' deoxy position
• C. DNA and RNA are equally stable in basic conditions
• D. RNA is more stable because of its base pairing

Answer: (B)

The stability of DNA and RNA under basic conditions is significantly influenced by their structural components. In particular, RNA contains ribose sugars, which have a hydroxyl group at the 2' position, while DNA has deoxyribose sugars, which lack this hydroxyl group at the same position. Under basic conditions, hydroxide ions (OH-) can promote hydrolysis, particularly of the phosphodiester bonds that link nucleotides together. The presence of the 2' hydroxyl group in RNA makes it more susceptible to this hydrolytic cleavage. When basic conditions prevail, the ribose in RNA can readily react with hydroxide ions, leading to the breakdown of the RNA molecule. In contrast, DNA, with its deoxyribose structure, does not have that reactive hydroxyl group at the 2' position. As a result, DNA is significantly more stable than RNA in alkaline conditions because it is less likely to undergo hydrolysis. This difference in stability is critical, as it has implications for the biochemistry of these nucleic acids, particularly their roles in cellular biology and the mechanisms that govern their functions. Thus, the stability of DNA compared to RNA in basic conditions can be attributed to the absence of the

The stability of DNA and RNA under basic conditions is significantly influenced by their structural components. In particular, RNA contains ribose sugars, which have a hydroxyl group at the 2' position, while DNA has deoxyribose sugars, which lack this hydroxyl group at the same position.

Under basic conditions, hydroxide ions (OH-) can promote hydrolysis, particularly of the phosphodiester bonds that link nucleotides together. The presence of the 2' hydroxyl group in RNA makes it more susceptible to this hydrolytic cleavage. When basic conditions prevail, the ribose in RNA can readily react with hydroxide ions, leading to the breakdown of the RNA molecule.

In contrast, DNA, with its deoxyribose structure, does not have that reactive hydroxyl group at the 2' position. As a result, DNA is significantly more stable than RNA in alkaline conditions because it is less likely to undergo hydrolysis. This difference in stability is critical, as it has implications for the biochemistry of these nucleic acids, particularly their roles in cellular biology and the mechanisms that govern their functions.

Thus, the stability of DNA compared to RNA in basic conditions can be attributed to the absence of the