For the process of transformation of glucose into pyruvate, NAD⁺ is converted into NADH. These same NADH molecules are then reutilised on the pyruvate to lactic acid reaction and are therefore transformed back into NAD⁺ molecules that will again be used for another glycolysis reaction.
From the first rectangle, on the left, to the last rectangle, on the right, it comes NAD⁺ - NADH - NADH - NAD⁺.
A reducing agent is an element or a compound that looses or donates electrons in a chemical reaction. The reducing agent undergoes oxidation (loss of electrons) in a chemical reaction. Bromine losses an electron and therefore it is the reducing agent while chlorine gains electrons and therefore it is an oxidizing agent.
If a rightward force is applied to a book, it moves right across the desk.
