MCQ
Advancement in genetic engineering has been possible due to discovery of:
- ATransposons
- ✓Endonucleases
- CExonucleases
- DOncogenes
✓
Answer
Correct option: B.
Endonucleases
"Endonucleases" Endonucleases or restriction enzymes is an enzyme which result in a series of advancements in techniques that allowed the direct modification of the genome. Other advancements include the discovery of $\text{DNA}$ ligases, the ability to design plasmids and technologies like polymerase chain reaction and sequencing.
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Two statements are given$-$one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below.
Assertion: Vector $\text{DNA}$ and foreign $\text{DNA}$ are cut by same restriction endonuclease.
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→Assertion: Vector $\text{DNA}$ and foreign $\text{DNA}$ are cut by same restriction endonuclease.
Reason: Digestion of vector $\text{DNA}$ and foreign $\text{DNA}$ with same enzyme produces complementary sticky ends.
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