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What does Roman numeral I in EcoRI show?

Answer and explanation

Correct answer: The first enzyme discovered from that bacterial strain

The governing concept is the naming convention for restriction enzymes. In EcoRI, “Eco” refers to the bacterium Escherichia coli, while the following letter and Roman numeral provide information about the strain and the order in which enzymes from that strain were identified. The Roman numeral I therefore indicates that this was the first restriction enzyme discovered from the particular strain. It does not describe DNA length, a gel lane, or reaction temperature. Those properties may be recorded separately in an experiment, but they are not encoded by the Roman numeral in the enzyme name. Hence option A is correct.

Related tags

EcoriRestriction EnzymesEnzyme NomenclaturePrinciples Of BiotechnologyBiotechnologyClass 11 Mcq

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