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There are two main strategies for the induction of transcription: a strong promoter is negatively controlled by a repressor protein and induction of transcription is effected by an inducer (a ligand that inactivates the repressor).
Report Abuse. Transcription factors are protein complexes that help RNA polymerase bind to DNA. RNA polymerase is the enzyme that transcribes genes to make messenger RNA, which is then used to make protein.By controlling RNA polymerase's access to the gene, transcription factors control the rate at which a gene is transcribed.Without transcription factors, cells would not be able to effectively regulate the rate at which genes are expressed.hat is the function of transcription factors in eukaryotic cells? A. They control the expression of certain genes. B. They bend the DNA to bring it close to the operator.