Introduction: A historical survey of the study of yeats, Sugar Utlization by Saccharomyces Cerevisiae, Hexose Transport, Sugar Phosphorylation in Yeast, Phosphoglucose Isomerase, Phosphofructokinase, Frcutose-1, Phosphoglycerate Kinase, Enolase, Pyruvate Kinase, Pyruvate Decarboxylases, Alcohol Decarboxylases, Genetics of Di- and Trisaccharide Utlisation, Glactose Metabolim in Saccharomyces Cerevisiae, The Pentose Phosphate Pathway, Storage of Carbohydrates in the Yeast Saccharomyces Cerevisiae, Glyercol Production and Osmoregulation..