Restriction enzymes are degradative enzymes which recognizes and cuts up DNA that is foreign to a cell. These enzymes protect bacteria against intruding DNA from other organisms such as virus or other bacterial cells. Related Theory Restriction endonuclease cuts DNA atspecific site, where complementary DNA binds. Multiple restriction enzyme increases the specificity of DNA binding sites, giving more reliable results.
Restriction endonucleases:
NEET UG 2004 — Zoology Biotechnology - Principles and Processes
2004mcqeasy
Restriction endonucleases:
Official previous-year question
Held on 30 Apr 2004 · Verified 9 Jul 2026.
Options
- A
are present in mammalian cells for degradation of DNA when the cell dies
- B
are used in genetic engineering for ligating two DNA molecule
- C
are used for in vitro DNA synthesis
- D
are synthesized by bacteria as part of their defense mechanism.
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