DNA Structure and Replication

ID #1680

when one of the answer choices says that the 5' and 3' of one strand COUNTERS the 5' and 3' of the other strand, is that trying to say that the 5' of the first strand is matched up to the 3' of the second strand? Or does it mean that the 5' of the first strand match up the 5' of the second strand? This goes for the 3' of the first strand and the 5' of the second strand.


Yes, your initial interpretation of the word "counters" is correct. This statement is suggesting that the 5' end of one strand is lined up with the 3' end of the other strand, and vice versa.

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