Why is RNA a less stable storage form of genetic information compared to DNA?

Why is RNA a less stable storage form of genetic information compared to DNA?

• A. The 2' OH group of the ribose can attack the phosphate backbone
• B. The 3' OH group of the ribose can attack the phosphate backbone
• C. RNA is single-stranded, whereas DNA is double-stranded
• D. A and C

Answer: (D)

RNA is indeed a less stable storage form of genetic information compared to DNA due to a combination of structural factors inherent to its chemistry and form. One reason for this instability lies in the 2' hydroxyl (OH) group present in the ribose sugar of RNA. This group makes the RNA molecule more reactive and vulnerable to hydrolysis. The presence of the 2' OH enables the potential for intramolecular reactions, where the OH group can attack the phosphodiester bond in the RNA backbone. This can lead to the breaking of the strand, contributing to its instability compared to DNA, where the deoxyribose lacks this 2' OH group. Furthermore, RNA typically exists as a single-stranded molecule, while DNA is predominantly found in a double-stranded form. The double-stranded structure of DNA provides a protective environment, with base pairing and helical configuration that shield the genetic material from environmental factors that might cause degradation. In contrast, the single-stranded nature of RNA exposes it to ribonucleases and other enzymatic actions that can readily degrade the molecule. Together, these factors—the reactive properties due to the 2' OH group and the protective benefits of double-stranded structure in DNA—ex

RNA is indeed a less stable storage form of genetic information compared to DNA due to a combination of structural factors inherent to its chemistry and form.

One reason for this instability lies in the 2' hydroxyl (OH) group present in the ribose sugar of RNA. This group makes the RNA molecule more reactive and vulnerable to hydrolysis. The presence of the 2' OH enables the potential for intramolecular reactions, where the OH group can attack the phosphodiester bond in the RNA backbone. This can lead to the breaking of the strand, contributing to its instability compared to DNA, where the deoxyribose lacks this 2' OH group.

Furthermore, RNA typically exists as a single-stranded molecule, while DNA is predominantly found in a double-stranded form. The double-stranded structure of DNA provides a protective environment, with base pairing and helical configuration that shield the genetic material from environmental factors that might cause degradation. In contrast, the single-stranded nature of RNA exposes it to ribonucleases and other enzymatic actions that can readily degrade the molecule.

Together, these factors—the reactive properties due to the 2' OH group and the protective benefits of double-stranded structure in DNA—ex