Explain the transformation of xanthine to uric acid by xanthine oxidase

With suitable diagrams explain which is the active Zn² site of carboxypeptidase A.

Explain "in vivo" and "in vitro" nitrogen fixation.

With suitable figures give the differences in the chemical structures of chlorophyll a and chlorophyll b,

Write a short note on rubredoxins.

What is cytochrome c Oxidase? Also explain the role of cytochrome P450 in drug metabolism.

With suitable figures explain the arrangement of the subunits of the apoferretin shell.

What is there in the 5th position of deoxyhemoglobin? Explain with a suitable diagram. Give the relevant equations for the equilibrium constant regarding the oxygen binding by myoglobin.

What are the ways by which the outer sphere electron transfer reaction is utilized to synthesize coordination compounds?

 Give the elementary steps and rate expression for the inner sphere mechanism which involves formation of a precursor complex.

What are the salient features of an outer-sphere electron transfer mechanism?

With the help of suitable diagrams explain the rearrangement of the cis  enantiomer by the bond rupture mechanism involving a trigonal bipyramidal intermediate.

Give suitable examples for trans-effect in octahedral complexes where CO and substituted phosphines are used as ligands.

Explain the dissociation mechanism and stereochemical changes for trans - [M(LL)₂BX] with the help of suitable diagrams.

Explain with suitable figures the Bailar twist mechanism followed in intramolecular racemization reactions.

With a suitable example suggest the order of the reactions of base-catalyzed hydrolyses and predict the mechanism that is followed in them.

Explain the mechanism of substitution reactions in trigonal bipyramidal complexes.

Give the classification of substitution mechanisms for octahedral complexes.

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