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Define the following with one example of each : (i) Zwitter ion ,(ii) Glycosidic linkage. |
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Answer» Solution :(i) Zwitter ion : The -COOH and `-NH_(2)` GROUPS of amino acidsdo notexists as suchbuttheyreact with each other to form internal saltstructure called Zwitter ion. It is a neutral species but carries both positive and negative charges. `H_(2)overset(. .)(N) - underset(R)underset(|)(Coverset(..)H)- overset(O)overset(||)(C) - underset(..)overset(..)(O): H to H_(3) overset(+)(N) - underset(R) underset(|)(CH) - overset (O)overset(||)(C) - overset(-)overset(..)underset(..)(O):` e.g., Amino acids. (II) Glycosidc linkage : Thelinkagewhichis estabilsed betweentwo carbohydrateswhichisestabished between twocarbohydrates units involvingreducing group as a result of removal of water molecule. e.g., Sucrose `C_(1)` of `alpha` - GLUCOSE and `C_(2)` of `BETA` - fructose 
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