What are restriction enzymes? Describe its classification and application in molecular biology.

Restriction enzymes, also known as molecular scissors, are enzymes that can recognize specific DNA sequences and cut double-stranded DNA at those specific sites. These enzymes play a crucial role in molecular biology, particularly in genetic engineering and DNA analysis techniques. Here's an overview of restriction enzymes, their classification, and applications.

Classification of Restriction Enzymes:
Restriction enzymes are classified into four main types based on their subunit composition, recognition sequence, and cleavage pattern:

1. Type I: These enzymes recognize specific DNA sequences and cleave the DNA at random sites away from the recognition sequence. They are typically composed of multiple subunits and require ATP for their activity.

2. Type II: This is the most commonly used type of restriction enzymes in _______ __________ ___ ____ _____ ___ _______ _________ ____.
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