Multiple choice

The enzyme that joins DNA fragments is:

  1. restriction endonuclease

  2. lipase

  3. peroxidase

  4. ligase
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

DNA ligase catalyzes the formation of phosphodiester bonds between DNA fragments, essential for joining DNA pieces in genetic engineering and replication. Restriction enzymes cut DNA, while lipase and peroxidase act on lipids and peroxides respectively, not nucleic acids.

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