PG entrance exam CUET PG 2025 Mock Test Life Sciences Fundamental Processes Control of gene expression
A researcher observes that gene expression is upregulated when a protein complex binds to a specific DNA sequence near the gene's promoter. What role does this protein complex likely serve in gene regulation?
1
It acts as a histone deacetylase, tightening DNA-histone interaction.
2
It functions as an activator complex, facilitating RNA polymerase binding.
3
It is a repressor complex, preventing transcription factor binding.
4
It acts as a methyltransferase, silencing the gene by methylation.