At which level the regulation of gene expression in eukaryotes can be done?

At transcriptional level . At processing level. At translational level. All of these .

All of these .

Regulation of gene expression refers to a very broad term that may occur at various levels. It can be regulated at several levels. In eukaryotes, the regulation could be exerted at : (i) transcriptional level (formation of primary transcript), (ii) processing level (regulation of splicing), (iii) transport of mRNA from nucleus to the cytoplasm, (iv) translational level.