NTA Abhyas NEET2020ChemistryBiomoleculesPractice
The ‘lock’ and ‘key’ model of enzyme action illustrates that a particular enzyme molecule
Options
- Amaybe destroyed and resynthesised several times
- Binteracts with a specific type of substrate molecule
- Creacts at identical rates under all conditions
- Dforms a permanent enzyme-substrate complex
Correct answer
B. interacts with a specific type of substrate molecule
Step-by-step solution
Emil Fisher (1894) proposed ‘lock and key theory’ for the mechanism of enzyme action, according to which the active sites of the enzyme have a specific geometric shape wherein the substrate molecules fit in just like a key in a particular lock. In other words, it illustrates that a particular enzyme molecule interacts with a specific type of substrate molecule.