Question

why is this specific type of restriction enzyme useful for dna fongerprinting anaylisis?

Answer 1

Restriction enzymes are tools that aid researchers in analyzing DNA samples.While everyone's DNA is truly unique, there are certain areas of your DNA that you share with every other person on the planet. Since scientists know the order or sequence of those bases, they have developed chemicals known as restriction enzymes that seek out those spots. So when a scientist is analyzing someone's DNA, they add restriction enzymes that find those spots that everyone has and the enzyme cuts the DNA strand into two parts.This results in different numbers of "chunks" of varying lengths/sizes.

Restriction enzymes attach to DNA and are activated by restriction sequences in the DNA. Once activated, the restriction enzymes hydrolyze and destroy the bonds between nucleotides. The restriction sequences along the DNA are inherited, thus, people who are related have similar restriction sequences along their DNA. Cutting DNA samples by the same restriction enzymes and analyzing the resulting DNA fragments by DNA fingerprinting indicates which DNA samples have similar restriction sequences.

Examples of restriction enzyme: EcoRI. It cleaves at the GAATTC recognition sequence.