NEET Biology question

Restriction endonucleases are

(A)Present in mammalian cells for degradation of DNA when the cell dies
(B)Used in genetic engineering for ligating two DNA molecules
(C)Used for in vitro DNA synthesis
(D)Synthesized by bacteria as part of their defence mechanismCorrect

Answer: (D)

Solution

Bacteria produce restriction endonucleases as part of a restriction-modification system that protects them by cleaving and destroying the DNA of invading bacteriophages, while their own DNA is protected from this cleavage

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-125457