Define the following terms:
$(i)$ Glycosidic bond
$(ii)$ Phosphodiester bond

(N/A) $(i)$ $A$ glycosidic bond is a type of covalent bond that joins a carbohydrate (sugar) molecule to another group,which may or may not be another carbohydrate. It is formed by a dehydration synthesis reaction between two monosaccharides,where a water molecule is removed.
$(ii)$ $A$ phosphodiester bond occurs in nucleic acids ($DNA$ and $RNA$). It links the $3'$ carbon atom of one sugar molecule to the $5'$ carbon atom of the sugar molecule of the succeeding nucleotide via a phosphate group. Since there is an ester bond on both sides of the phosphate group,it is termed a phosphodiester bond.