Answer:
Eukaryotes are able to regulate gene expression in groups of genes through the coordination of transcription factors. Transcription factors are proteins that bind to specific DNA sequences near the genes they regulate and either enhance or repress their transcription. The transcription factors can work together to activate or repress the transcription of genes in groups, allowing for coordinated gene expression. In some cases, transcription factors may bind to enhancer or silencer elements located far away from the genes they regulate, forming enhancer or silencer complexes. These complexes can then recruit other transcription factors and co-activators or co-repressors to modulate gene expression in a coordinated manner. Therefore, activators and repressors act together to increase gene expression by binding to regulatory sequences near the genes they regulate and working in groups to coordinate gene expression.