DNA strands can be clipped crosswise at selected positions by using enzymes called

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Restriction endonucleases are enzymes that cut DNA at specific recognition sequences, or restriction sites. They are often used in molecular biology for tasks such as creating recombinant DNA and genetic engineering. Palindromes refer to sequences that read the same backwards and forwards, and may be recognized by some restriction endonucleases. Reverse transcriptases are enzymes that create complementary DNA from RNA templates. Ligases join DNA fragments together, and DNA polymerases are enzymes that synthesize DNA. While all of these enzymes play important roles in molecular biology, only restriction endonucleases specifically fit the description of being able to clip DNA strands crosswise at selected positions.

DNA Strands Can Be Clipped Crosswise at Selected Positions by Using