Answer : The balanced chemical reaction will be,

Explanation :
Balanced chemical equation : It is defined as the number of atoms of individual elements present on reactant side must be equal to the product side.
As per question, when a glucose molecule is oxidized in the body then it produced water and carbon dioxide as a product.
The balanced chemical reaction will be,

This reaction is also known as the combustion reaction in which the hydrocarbon molecule react with the oxygen to give carbon dioxide and water as a product.