where was he born?
Paris.
Anselme Payen
Payen was born in Paris. 
a food preservation method in which microorganisms metabolize components of a food is UNANSWERABLE what do you mean by metabolism? It is the set of life-sustaining chemical reactions in organisms. what are the main purposes of it? The conversion of food/fuel to building blocks for proteins, lipids, nucleic acids, and some carbohydrates; and the elimination of metabolic wastes. what is the role of amino acids and protein in this process? Proteins are made of amino acids arranged in a linear chain joined together by peptide bonds. Many proteins are enzymes that catalyze the chemical reactions in metabolism. who discovered the above mentioned which catalyze the chemical reaction? Anselme Payen was the first to discover an enzyme ,diastase. and when did he discover? Discovered the enzyme diastase and the carbohydrate cellulose.
wiki:5389335
Anselme Payen [SEP] Biography
Payen was born in Paris. He began studying science with his father when he was a 13-year-old, and later studied Chemistry at the École Polytechnique under the chemists Louis Nicolas Vauquelin and Michel Eugène Chevreul. At the age of 23, Payen became manager of a borax-refining factory, where he developed a process for synthesizing borax from soda and boric acid. Previously, all borax had been imported from the East Indies exclusively by the Dutch. Payen's new method of synthesizing borax allowed him to sell the mineral at one third the going price, and break the Dutch monopoly. Payen also developed processes for refining sugar, along with a way to refine starch and alcohol from potatoes, and a method for determination of nitrogen.