NEET Previous Year Question

Following statements describe the characteristics of the enzyme Restriction endonuclease. Identify the incorrect statement.

Topic: NEET PYQ

Answer: B. Full step-by-step solution below.

  1. AThe enzyme cuts DNA molecule at identified position within the DNA
  2. BThe enzyme binds DNA at specific sites and cuts only one of the two strands.
  3. CThe enzyme cuts the sugar-phosphate backbone at specific sites on each strand.
  4. DThe enzyme recognizes a specific palindromic nucleotide sequence in the DNA

Correct answer: B

Solution

(b) Restriction endonucleases typically cut both strands of DNA at specific recognition (often palindromic) sequences, not just one strand.

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