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Solution


Q.

Name the class of enzyme that usually catalyze the following reaction :               [2025]

S–G+S#→S+S#–G

Where, G → a group other than hydrogen

             S → a substrate

             S# → another substrate
1 Hydrolase  
2 Lyase  
3 Transferase  
4 Ligase  

Ans.

(3)

Enzymes catalysing a transfer of G group, (other than hydrogen) between a pair of substrates, S and S’ are known as transferases.

S–G+S#→S+S#–G

•    Ligases catalyse the linking together of 2 compounds such as C – O, C – S, C – N bonds etc

•    Lyases catalyse removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds

Hydrolases are enzymes that catalyse hydrolysis of ester, ether, peptide , glycosidic, C – C, C – halide or P – N bonds.