The Maillard reaction is a non-enzymatic reaction between amino acids and reducing sugars. This reaction is responsible for the browning of food during cooking and is important in the development of flavors, especially in roasted or fried foods. It is a complex series of chemical reactions that occur when amino acids (the building blocks of proteins) react with reducing sugars at elevated temperatures.
- Option (1) is incorrect because Maillard browning does not involve an enzymatic reaction; it is non-enzymatic in nature.
- Option (3) and (4) are incorrect because Maillard browning does not involve lipids, but rather the reaction of amino acids and reducing sugars.
Thus, the correct answer is option (2): Non-enzymatic reaction between amino acids and reducing sugars.