Question

In nomenclature of REN (restriction endo - nuclease) $Hind$ $III$, III stands for

• A. Genus name
• B. Species name
• C. Order of discovery
• D. Strain of the organism

Answer 1

The correct option is C Order of discovery

• Restriction enzymes are named based on the organism in which they were discovered.
• The first three letters of the name are italicized because they abbreviate the genus and species names of the organism. $Hind$ $III$ enzyme was isolated from Haemophilus influenzae .
• The fourth letter is for the bacterial strain designation.
• Typically, the Roman numeral indicates the order in which restriction enzymes were discovered in a particular strain.

Thus, the correct answer is option C.