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(D) The first restriction endonuclease,known as $HindII$,was isolated from the bacterium $Haemophilus$ $influenzae$ $Rd$. However,in the context of th

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Pneumococcus

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(D) The first restriction endonuclease,known as $HindII$,was isolated from the bacterium $Haemophilus$ $influenzae$ $Rd$. However,in the context of the provided options,the question refers to the historical discovery of restriction enzymes. $HindII$ was the first to be characterized,and its discovery was based on the observation that $Bacteriophage$ growth in $E. coli$ was restricted. Among the options provided,$HindII$ is the correct enzyme,but since $Haemophilus$ $influenzae$ is not listed,we must identify the source related to the discovery of restriction systems. Historically,the first restriction enzyme $HindII$ was isolated from $Haemophilus$ $influenzae$. Given the options,if we consider the context of the first restriction enzyme discovery,the question might be referencing the general study of restriction-modification systems in bacteria like $Haemophilus$ $influenzae$.

The first restriction endonuclease was isolated from which of the following?

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