Answer: The complementary base pairing helps in proper pairing of the bases.
Explanation:
The complementary of base pair shows that the adenine will only bind to the thymine and the guanine will only bind to the cytosine and with any other base pair.
So, the template no matter how long it is, the adenine in them will bind to the thymine and the cytosine will bind to the guanine.
The bonds in between are double hydrogen bond in case of adenine and thymine and triple hydrogen bond in case of guanine and cytosine.
This aids in pairing of 6 billion bases during the time of DNA replication in human beings.
