Erosion and deposition have a few things in common. First They both deal with rainwater and they both have to do with rivers
The sugar is the 3' end, and the phosphate is the 5' end of each nucleiotide. The phosphate group attached to the 5' carbon of the sugar on one nucleotide forms an ester bond with the free hydroxyl on the 3' carbon of the next nucleotide.
It is a wall that protects the plant cell.