MCQ
Which of the following is true for nucleolus ?
- ✓It is a site for active ribosomal $RNA$ synthesis.
- BLarger nucleoli are present in dividing cells.
- CIt takes part in spindle formation.
- DIt is a membrane-bound structure
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$i.$ Glucose or galactose may bind with the repressor and inactivate it.
$ii.$ In the absence of lactose, the repressor binds with the operator region.
$iii.$ The z-gene codes for permease.
$iv.$ This was elucidated by Francois Jacob and Jacque Monod.

