MCQ
The restriction enzymes are used in genetic engineering, because:
- AThey can degrade harmful proteins.
- BThey can join different DNA fragments.
- CThey can cut DNA at spe cific base sequence.
- DThey are nucleases that cut DNA at variable sites.
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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.