NEETBotanyBiomolecules (B)
During an enzyme-catalysed reaction, it is observed that the binding of the substrate has just induced the enzyme to alter its shape, fitting more tightly around the substrate. According to the catalytic cycle of enzyme action, what is the immediate next step?
Options
- AThe substrate binds to the active site of the enzyme.
- BThe active site breaks the chemical bonds of the substrate to form the enzyme-product complex.
- CThe enzyme releases the products of the reaction.
- DThe free enzyme is ready to bind to another molecule of the substrate.
Correct answer
B. The active site breaks the chemical bonds of the substrate to form the enzyme-product complex.
Step-by-step solution
The catalytic cycle of an enzyme action proceeds in a specific sequence: 1. First, the substrate binds to the active site of the enzyme. 2. The binding of the substrate induces the enzyme to alter its shape, fitting more tightly around the substrate. 3. The active site of the enzyme, now in close proximity to the substrate, breaks the chemical bonds of the substrate and the new enzyme-product complex is formed. 4. The enzyme releases the products of the reaction and the free enzyme is ready to bind to another molec