A) Competitive inhibitor
B) Allosteric enzyme
C) Co-enzyme
D) All of the above
Correct Answer: B
Solution :
In case of allosteric enzyme there is no competition for active site between substrate and inhibitor but the inhibitor fixes itself with some other site of enzyme called allosteric site, and causes the conformational change in active site of enzyme so that substrate cannot bind and reaction stops. Competitive inhibitor is a substance which closely resembles the substrate in molecular structure and compete with the substrate for binding at active site. As a result reaction rate slow down. The enzymes require a non-protein component called prosthatic group for their activity. When the prosthatic group is an organic substance it is called Co-factor or Co-enzyme. The Co-enzymes are often vitamins (NAD, NADP, ATP, Co-A, FMN, FAD).
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