Question

There is a restriction endonuclease called EcoRI.
What does co. part in it stand for ?
(a) colon (b) coelom
(c) coenzyme (d) coli

Answer 1

There is a restriction endonuclease called EcoRI. The co. part in it stand for coli.

Option (d) coli.

• This restriction endonuclease called EcoRI is found ( isolated from strain of the organism - named bacterium Escherichia coli [co]) in the colon bacteria E. coli. Hence, the 'co' stands for coli.
• As the name implies, it is used as a restriction enzyme.

Answer 2

Hello dear,

◆ Answer - (d) coli

In EcoRI, co stands for *coli*.

● Explanation -

- Restriction endonucleases are named according to specific nomenclature.

- First 3 letters indicate genus & species of the bacterium from which it's derived, next letter indicates the strain of the organism & lastly comes the order in which the enzyme was discovered.

- In EcoRI, Eco stands for E.coli, R stands for strain Rd & I means it's 1st enzyme to be discovered in that series.

Hope this helped you. Thanks for asking.