Question

Which of the following statement(s) is/are correct?
Statement 1: In prokaryotes, gene expression is generally regulated at the site of transcriptional initiation.
Statement 2 : In eukaryotes regulation of gene expression occurs at multiple levels

• A. Only statement 1 is correct
• B. Only statement 2 is correct
• C. Both statement 1 and 2 are correct
• D. Both stament 1 and 2 are wrong

Answer 1

The correct option is C Both statement 1 and 2 are correct

The complexity in the structure of the eukaryotic cell shows the regulation of gene expression occurs at multiple levels.
- Transcriptional level - formation of primary transcript
- Processing level - regulation of splicing (removal of non coding sequences i.e. introns)
- Transport of mRNA from nucleus to cytoplasm
- Translation level (protein synthesis)

Whereas, in prokaryotes the lack of the membrane bound organelles and nucleus does not exhibit the stages of the gene expression in different areas of the cell . This results in the regulation of gene expression at the site of transcriptional initiation.