In genetic engineering, the enzyme used to cut DNA at specific sequences is: MCQ with Answer and Explanation

In genetic engineering, the enzyme used to cut DNA at specific sequences is:
A. Restriction endonuclease
B. Helicase
C. DNA polymerase
D. Ligase
Answer: Option A
Solution (By JKSSB Mock Tests)
Restriction endonucleases (restriction enzymes) recognize specific palindromic DNA sequences and cleave the phosphodiester bonds, producing sticky or blunt ends. They are essential tools for recombinant DNA technology. DNA polymerase synthesizes DNA, ligase joins fragments, helicase unwinds. Examples: EcoRI, HindIII. These enzymes are naturally present in bacteria as a defense against viruses.

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Which of the following is an example of a viral disease?
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Correct Answer: Option C


Explanation:
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Correct Answer: Option D


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Correct Answer: Option A


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