Question

Eco RI is

• A. a restriction enzyme
• B. a plasmid
• C. used to join two DNA fragments
• D. the abbreviation for bacterium Escherichia coli

Answer 1

The correct option is A a restriction enzyme

EcoRI is a restriction endonuclease enzyme isolated from species E.coli. The Eco part of the enzyme's name originates from the species from which it was isolated, while the R represents the particular strain, in this case, RY13. The last part of its name, the I, denotes that it was the first enzyme isolated from this strain. Restriction enzymes are also known as molecular scissors, which are used for cutting DNA at specific locations. EcoRI is a restriction enzyme that cleaves DNA double helixes into fragments at specific sites.