Question
Distinguish between:
- Reducing sugars and non-reducing sugar.
- Purine and pyrimidine.
| S. No | Reducing Sugars | Non-Reducing Sugars |
| (a) | The sugars have a free aldehyde or ketone group. The sugars can reduce cupric ions of Benedict's or Fehling's solution to cuprous ions. | A free aldehyde or ketone group is absent. They do not reduce cupric ions of Benedict's or Fehling's solution to cuprous ions. |
| (b) | e.g., ribose, glucose, erythose. | e.g., sucrose, maltose, lactose |
| S. No | Purine | Pyrimidine |
| (a) | Purines are large sized nitrogen containing biomolecules. | Pyrimidines are smaller sized nitrogen containing biomolecules. |
| (b) | It is nine membered and has a double ring. A purine contains four nitrogen atoms at 1', 3', 7' | It is 6 membered and has a single ring. A pyrimidine has nitrogen atoms at two places -1’ and 3' and 9'. |
| (c) | e.g., adenine and guanine. | e.g., cytosine, thymine and uracil. |
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