All the following are biotin independent carboxylation reactions, EXCEPT
The  conversion of  pyruvate to  oxaloacetate by  biotin  dependent  pyruvate  carboxylase is essential for the synthesis of glucose from  many non-carbohydrate sources.
Addition of CO2 to from C6 in purine ring
Conversion of pyruvate to malate by malic enzyme
Acetyl CoA carboxylase
Carbamoyl phosphate synthetase