Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: Note Organic and biochemical equations are frequently written showing only the organic reactants and products. In this way, we focus attention on the organic starting material and product, rather than on balancing complicated equations. Ethanol is oxidized in the liver to acetaldehyde:. Answer: products
A:
Organic and biochemical equations show the initial and final products of the equation, respectively known as the reactants and what else?