Question

The letter 'R' in EcoRI is derived from

• A. The name of genus
• B. The name of strain
• C. The name of species
• D. None of the above
  

Answer 1

Answer: (B)

The name of strain

In $EcoRI$,

• $E$ comes from the genus Escherichia.
• $co$ is from the species $coli$.
• $R$ is from $RY13$ (strain).
• The Roman number I indicates that it was the first enzyme isolated from the bacterium $E.coli$ $RY$ $13$.

So, the correct answer is 'The name of strain'.