NEET Zoology Biotechnology Principles and Processes Questions Solved


The restriction enzymes most commonly used in rDNA technology are

1. Type 1 Restriction enzymes

2. Type II Restriction enzymes

3. Type III Restriction enzymes

4. Type IV Restriction enzymes

Type I RE-Cleave randomly far from their recognition sites.

Type II RE- Cleave within or close to their recognition sites

Type III RE – Require two recognition sites in opposite orientation and cleave outsid e the recognition site

Type IV RE- Cleave Methylated/Modified DNA sites.

Difficulty Level:

  • 11%
  • 82%
  • 7%
  • 2%
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