91Ó°ÊÓ

Gene expression can be regulated at any stage like transcription, processing of pre-mRNA to mature mRNA, transportation of mRNA from the nucleus to the cytoplasm, translation, and post-translation.

Option b is correct because Post-translation control is a mechanism by which the protein structure is altered after translation. The post-transcriptional process involves modification of pre-mRNA such as capping, splicing, and polyadenylation in the nucleus. It is a regulation of the gene expression after the translation process or the formation of protein.

Option a is incorrect because post-translation control refers to the regulation of gene expression after translation.

Option c is incorrect because post-translation control refers to the regulation of gene expression after translation.

Option d is incorrect because post-translation control refers to the regulation of gene expression after translation.