OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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which enzymes used in genetic engineering are called molecular scissors
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Endonucleases
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DNA ligase
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Restriction endonucleases
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Exonucleases
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Explanation:
Detailed explanation-1: -Restriction enzymes are also called “molecular scissors” as they cleave DNA at or near specific recognition sequences known as restriction sites. These enzymes make one incision on each of the two strands of DNA and are also called restriction endonucleases.
Detailed explanation-2: -The enzyme Restriction endonuclease is used for this purpose. This enzyme is known as ‘genetic scissors’.
Detailed explanation-3: -Restriction endonucleases are molecular scissors that recognize short DNA sequences usually 4–8 bp in length and cut the phosphodiester bond within or close to their target sites to generate a double-stranded break.
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