Activator proteins increase gene expression, whereas repressor proteins inhibit gene expression. Which statement concerning activator and repressor proteins in eukaryotes is true? Eukaryotes use transcription factors instead of activators or repressors. Repressors are more common than activators in eukaryotes. Activators are more common than repressors in eukaryotes. Activators and repressors are equally common in eukaryotes.