GCSE Biology - What are Enzymes?

The video explains the role and importance of enzymes in biological processes. It covers how enzymes act as catalysts to speed up chemical reactions without being consumed. The structure of enzymes, composed of amino acids, allows them to have specific active sites that bind to substrates. The video also discusses two models of enzyme action: the lock and key model and the induced fit model, highlighting how enzymes change shape to fit substrates more effectively.

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