Explain lock and key model of enzyme action?

Question: Explain lock and key model of enzyme action?

The lock and key model of enzyme action is a simple way to understand how enzymes work. Enzymes are proteins that speed up chemical reactions in living cells. They do this by binding to specific molecules called substrates and lowering the activation energy needed for the reaction to occur. The lock and key model compares the enzyme to a lock and the substrate to a key. Only the right key can fit into the right lock and open it. Similarly, only the right substrate can fit into the right enzyme and activate it. The part of the enzyme where the substrate binds is called the active site. The shape and chemical properties of the active site are complementary to those of the substrate. When the substrate binds to the enzyme, it forms an enzyme-substrate complex. This complex can then break down or join together the substrate molecules, depending on the type of reaction. The products of the reaction are then released from the enzyme, which can bind to another substrate molecule and repeat the process.

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