Base pairing
Explanation:
DNA has strict base-pairing rules. Purine bases (A & G) pair with pyrimidine bases (C & T). And specifically, Cytosine pairs with Guanine while Adenine pairs with Thiamine.
This way during replication, the template strand enables the formation of a new strand that is the exact copy of the non-template strand, due to this base pairing. This biological 'rule' reduces the error rate during replication and ensures high integrity in producing exact copies of DNA.
Learn More:
For more on base-pairing check out;
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