title: Problem-solving test: Tryptophan operon mutants.
abstract: Terms to be familiar with before you start to solve the test: tryptophan, operon, operator, repressor, inducer, corepressor, promoter, RNA polymerase, chromosome-polysome complex, regulatory gene, cis-acting element, trans-acting element, plasmid, transformation.
authors.affiliation: Department of Medical Biology, Medical School, University of Pécs, H-7624 Pécs, Hungary. jozsef.szeberenyi@aok.pte.hu.
authors.forename: József
authors.initials: J
authors.lastname: Szeberényi