(i) Reducing sugars and non-reducing sugar
(ii) Purine and pyrimidine
(i) Differences between reducing sugars and non-reducing sugars are given below
1.The sugars have a free aldehyde or ketone group.The sugars can reduce cupric ions of Benedict’s or Fehlings solution to cuprous ions.
e.g., ribose, glucose, erythose
2.A free aldehyde or ketone group is absent. They do not reduce cupric ions Benedict’s or Fehling’s
solution to cuprous ions.
e.g., Sucrose, maltose, lactose
(ii) Differences between purine and pgrimidine are given below
1.Purines are large sized nitrogen containing biomolecules.
2.It is nine membered and has a double ring. A purine pyrimidine has contains four nitrogen atoms at 1’,3’ , 7’ and 9’
3.e.g., Adenine and guanine.
1.Pyrimidines are smaller sized nitrogen containing. biomolecules.
2.It is 6 membered and has a single ring. A nitrogen atoms at two places 1’ and 3’.
e.g.,Cytosine, thymine and uracil.