Lock and key model was proposed by _?

Explanation

The lock and key model was proposed by Emil Fischer in 1894. Emil Fischer, a German chemist, introduced this concept in the late 19th century. The lock and key model describes the specificity of enzyme-substrate interactions. The lock and key model helps illustrate the specificity of enzymes for their substrates. It suggests that enzymes have a pre-existing active site with a specific shape and chemical environment that complements the substrate. This model has been valuable in understanding the molecular basis of enzyme-substrate interactions and catalysis. However, it is essential to note that the concept has evolved, and the induced fit model provides a more accurate description of enzyme-substrate binding.