8. Respiration

Oxidation is the _________________________, and reduction is the _________________________.

When glucose donates electrons to NAD⁺ creating NADH, the glucose molecule becomes:

An electron carrier before it harvests energy from glucose molecules in a series of gradual steps is:

What is the oxidizing agent in the following reaction?

Pyruvate + NADH + H⁺ → Lactate + NAD⁺

a. Oxygen

b. NADH

c. Lactate

d. Pyruvate

Draw a chemical equation to represent the redox reaction that occurs when methane (CH₄) burns in the presence of oxygen (O₂). Identify the reactant that is reduced and the reactant that is oxidized. Of the four molecules that should be in your equation, point out the one that has bonds with the highest potential energy.