Of the many carbon sources, yeast prefers glucose. In the presence of glucose, enzymes of the galactose metabolic pathway are not expressed. Even a disaccharide containing glucose moiety such as sucrose, is not utilized until all the available free glucose is completely consumed. Yeast maintains a strict hierarchy in terms of sugar utilization and glucose is at the top. Does it offer any advantage to yeast despite the free energy content between say galactose and glucose is the same? Growth is a resultant of all the biological activities of a cell. Quantitative analysis of growth provides insights into the metabolic strategies adapted by different organisms or same organisms under different experimental or physiological conditions. In this section, I shall briefly discuss the basic aspects of cell growth with a focus on what a cell or a living organism considers important for its evolutionary success.
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(2008). Adaptation to Environment. In: Galactose Regulon of Yeast. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74015-5_2
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