Question

In the nomenclature of enzyme restriction endonuclease, the roman numeral indicates

• A. Number of times it is used
• B. The order of discovery from source
• C. Number of cuts of DNA
• D. Number of recombinants formed

Answer 1

The correct option is B The order of discovery from source

The convention for naming restriction enzyme is as follows:

• The first letter of the name comes from genus and second letter comes from the species of the bacteria or prokaryotic cell from which the enzyme was isolated.
• The next alphabet is derived from the name of strain.
• The roman number indicates the order in which the enzymes were isolated from the strain of bacteria.

So, the correct answer is 'The order of discovery from source'.