What enzyme cuts DNA at precise sequences to produce fragments?

• A. Pedigree
• B. Nondisjunction
• C. Restriction Enzyme
• D. Gel Electrophoresis

Answer: (C)

Restriction enzymes cut DNA at specific sequences called recognition sites, producing DNA fragments of defined lengths. They’re used because they recognize precise patterns in the DNA and make cuts at those spots, which is essential for cloning, mapping, and many genetic analyses. Some restriction enzymes create blunt ends, others leave sticky ends with overhangs that help join fragments in predictable ways. After cutting, techniques like gel electrophoresis separate the resulting fragments by size to analyze the pattern. The other terms aren’t enzymes: a pedigree is a family inheritance chart, and nondisjunction is an error in chromosome separation during cell division.