Which one of the following events does not occur during gene regulation in eukaryotes?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Replication level
Option (1) Replication level — Not a level of gene regulation in eukaryotes. Replication is the copying of the whole DNA before a cell divides. It makes a second copy of every gene; it does not decide whether a gene forms its polypeptide. So it is not one of the levels of gene regulation.
Option (2) Translational level — A level of gene regulation in eukaryotes. Even after the mRNA reaches the cytoplasm, the cell can control how much of it is translated into protein on the ribosomes.
Option (3) Transportation of mRNA from nucleus to cytoplasm — A level of gene regulation in eukaryotes. In eukaryotes the mRNA is made in the nucleus but used in the cytoplasm. Controlling its exit from the nucleus controls how much protein is made.
Option (4) Transcriptional level — A level of gene regulation in eukaryotes. Here the cell controls whether, and how often, a gene is copied into RNA, that is, the formation of the primary transcript.
NCERT Extract:
Regulation of Gene Expression –
