Home Biology Biotechnology Principles and Processes NCERT Roman numbers following the names of restric…
Biology Biotechnology Principles and Processes NCERT Single Correct MCQ
Published on: August 14, 2026

Roman numbers following the names of restriction endonuclease indicate:

A
The order in which the enzymes were isolated from that strain of bacteria
B
strain of bacteria
C
the order in which genus is taken to isolate the enzyme
D
none of the above

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The correct answer is:
A

In the naming of restriction enzymes:

The first letter(s) come from the genus of the bacterium.

The next letters come from the species.

The Roman numeral (I, II, III, etc.) shows the order in which different enzymes were discovered/isolated from the same bacterial strain.

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