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22 February, 10:48

Restriction-modification (RM) systems are important mechanisms for protecting bacteria from acquisition of foreign DNA. Which of the following are characteristics of RM systems? A. RM systems non-specifically methylate host DNAB. DNA from a donor with the same RM system will be accepted by a recipientC. RM systems cleave DNA specificallyD. DNA from a donor with a different RM system will be accepted by a recipientE. RM systems retain molecular memory of prior foreign DNA exposure

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  1. 22 February, 13:17
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    The answers are letters A and C

    Explanation:

    A. RM systems non-specifically methylate host DNA

    C. RM systems cleave DNA specifically

    Because RM systems force the genetic elements maintenance on the cell through postsegregational cell killing. Some prokaryotes have developed several types of restriction modification systems.
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