RNA can be hydrolyzed by dilute alkali but not DNA. explain why?

in short, RNA has a free 2' hydroxyl group DNA doesnt.

DNA has 2-deoxyribose sugar on its backbone [hydrogen instead of hydroxyl group on 2' position]. It used its 3' hydroxyl to link two molecule of nucleotides together, so there's no free hydroxyl group hanging around. RNA has a free 2' hydroxyl group; it can be used as a nucleophile, although it's fairly weak, to attack the phosphorus atom in the phosphodiester bond and therefore break the bond, in another word, RNA hydrolyzes itself. a basic condition might help the hydrolysis process by making RNA itself a better nucleophile.

that's why RNA is less stable than DNA and the cell can target specifically the RNA and destory them while keep all DNA molecules safe. Another way to think about this is, to remove 2' hydroxyl group on ribose sugar takes energy, if it is not essential to its survival, the cell wont be doing it.
More Questions and Answers:
  • precipitates?
  • When CO2 comes in contact with magnesium, what happens?
  • Convert the following to number of atoms or molecules. 1.00 x 10^-3 mole of CO?
  • write a balanced equation shows solid sodium oxide is added to water?
  • What are the forms of Artificial Itelligence?
  • What is the freezing point of kelvin?
  • Another emergency chemistry equation?
  • which symbol in the periodic table is named after an emperor?
  • What is the natural compund that beryllium is found in? for arsenic too?