its) The major elemental demands of a cell growing in a fermentation are carbon, hydrogen, oxygen and nitrogen, and the normal sources include sugars (chemical formulas that are multiples of CH2O ), oxygen gas, \& ammonia. The following simplified reaction can be used to represent cell growth, given the necessary nutrients (on the left) to grow cells (cells are often represented as a decimal chemical formula, such as CH15.5O2.43N0.35 ) and give off byproducts (CO2 and H2O). Assume cells grow according to the following stoichiometry: (a) Do elemental balances on this reaction to find the 4 equations that represent restrictions on the relationships between stoichiometric coefficients A, B, C, D, E, and cell composition values a, b, c, and d. (b) The cell's chemical formula (C2HbOCNd) can usually be found using laboratory techniques such as elemental analysis. Once you know a,b,c, and d, how many degrees of freedom are left to describe the system? (In other words, how many more equations are needed to determine the stoichiometric coefficients A, B, C, D and E?) Recall concepts from your material and energy balances class to help with this