Assertion :Restriction enzymes of different organisms that recognize the identical sequences are called isoschizomers. Reason: They are present only in eukaryotes.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Assertion is incorrect but Reason is correct.

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Solution

The correct option is C Assertion is correct but Reason is incorrect.
An isoschizomer is an enzyme that recognizes the same sequence as another. A maximum number of 8-10 most common isoschizomers are indicated for every enzyme. Restriction enzymes from different organisms may recognize the same DNA sequence. If the enzymes recognize the same site and cleave at the same position, they are labeled isoschizomers. Isoschizomers are isolated from different bacterial species or strains. They are present in prokaryotes.

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(e) Assertion is incorrect but reason is correct.

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