A novel, current-based cholesterol biosensor was produced by electrochemical polymerization of pyrrole monomers, using cholesterol oxidase(Ch Ox) and horseradish peroxidase(HRP) as catalysts. Polypyrrole(PPY) was prepared by electrochemical polymerization and the microstructure of the PPY film was characterized by scanning electron microscopy(SEM). The electrochemical characteristics and anti-interference capacity of the biosensor were evaluated by cyclic voltammetry(CV). The results of this analysis reveal...