Q. 16. Control of gene expression takes place at the level of
(a) DNA-replication
(b) transcription
(c) translation
(d) None of these
Ans. (b). Considering that gene expression results in the formation of a polypeptide, 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 the nucleus to the cytoplasm
(iv) translational level
While, in prokaryotes, control of the rate of transcriptional initiation is the predominant site for control of gene expression,
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