YEAST IS ONE OF THE SMALLEST FUNGI KNOWN ;BUT IT IS UNLIKE TYPICAL FUNGI .ITS MAIN FEATURE IS ITS UNICELLULAR CHARACTER AND ITS ABILITY TO CAUSE FERMENTATION BY ANAEROBIC RESPIRATION ;AND THEREFORE ITS USE IN BEER &BREAD MAKING ; ITS USE FOR GENERATING ELECTRICITY IS ALSO EMERGING AS ANOTHER USEFUL FEATURE .FOR SCIENTISTS IT IS A MODEL ORGANISM FOR SCIENTIFIC RESEARCH TO LEARN ABOUT INTRA CCELLULAR PROCESSES OF EUKARYOTES AND GENETICS