Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Problem:Passage: Some enzymes require the presence of a non-protein molecule called a cofactor in order to function properly. Cofactors can be inorganic metal ions or small organic molecules. Many vitamins, such as B vitamins, act as cofactors. Some metal ions which function as cofactors for various enzymes include zinc, magnesium, potassium, and iron. Answer: cofactor
Solution:
Some enzymes require the presence of a non-protein molecule to function properly. what is that molecule called?