The modified lock-and-key theory of enzyme action proposed by Emil Fischer has been completely replaced by more modern ideas of catalysis.

Question

Quizplus · Accepted Answer

The modified lock-and-key theory, often referred to as the induced fit model, has not been completely replaced but rather expanded upon by more modern theories such as transition state theory and enzyme dynamics. The concept of enzymes undergoing conformational changes to bind substrates more effectively is still a fundamental part of understanding enzyme catalysis.

The Modified Lock-And-Key Theory of Enzyme Action Proposed by Emil