AIIMS2006BotanyBiomolecules (B)
The figure given below shows three velocitysubstrate concentration curves for an enzyme reaction. What do the curves a, b , and c depict respectively?
Options
- Aa-normal enzyme reaction, b-competitive inhibition, c-non-competitive inhibition
- Ba-enzyme with an allosteric modulator added, b-normal enzyme activity, c-competitive inhibition
- Ca-enzyme with an allosteric stimulator, b-competitive inhibition added c-normal enzyme reaction
- Da-normal enzyme reaction, b-non-competitive inhibitor added c-allosteric inhibitor added
Correct answer
A. a-normal enzyme reaction, b-competitive inhibition, c-non-competitive inhibition
Step-by-step solution
Enzymes or biocatalysts are proteinaceous substance that are capable of catalysing chemical reactions of biological systems without themselves undergoing any change. In the graph a shows normal enzyme reaction, graph b shows competitive inhibition and graph c shows non competitive inhibition. In competitive inhibition the inhibitor, which is a substrate analogue, combines reversibly to the free enzyme at the active site. In non competitive inhibition, the inhibitor binds to enzyme at a place other than substrate bi