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Identify the wrong statement with regard to Restriction Enzymes.

1. (a) They cut the strand of DNA at palindromic sites.
2. (b) They are useful in genetic engineering.
3. (c) Sticky ends can be joined by using DNA ligases.
4. (d) Each restriction enzyme functions by inspecting the length of a DNA sequence.

Correct answer: (d) Each restriction enzyme functions by inspecting the length of a DNA sequence.

Solution

Restriction enzymes recognize specific DNA sequences, often palindromic, and cut at or near those sites. They are widely used in genetic engineering, and sticky ends can be sealed by DNA ligase; they do not act by checking the length of DNA.

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