Plants store various sugars in their fruits, to entice animals to eat them. Although we
often talk about glucose, fructose (C6H12O6) is found in many fruits. An apple contains
12.5 g of fructose (along with 5.6 g of glucose and 3.9 g of sucrose). When fructose is
oxidized, it releases 672 kcal/mole of energy. Some of this energy gets stored in the form
of ATP. ATP can store 7.3 kcal/mole of energy.
a. If all the energy from fructose oxidation was converted to ATP, how many ATP
molecules would be produced from each molecule of fructose?
b. In actuality, approximately 32 molecules of ATP are produced. What fraction of the
available energy ends up as ATP?
c. Where does the rest of the energy go?
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