Question

What does R indicate in EcoRI?

• A. Enzyme isolated from strain of bacteria
• B. Genus of bacteria
• C. Sequence of enzyme
• D. Species of bacteria

Answer 1

Answer: (A)

EcoRI is a restriction endonuclease that is isolated from the bacterium Escherichia coli.

In EcoRI, Eco represents the species of bacteria from which it is isolated i.e. Escherichia coli. R represents the strain of the bacteria which is RY-13 in this case. I represent that it was the first enzyme isolated from this strain.

So, the correct answer is A.