Open the combination lock using the old combination. Remove the u-bar from the lock body so it's in the Unlock position. Use a screwdriver to open the anti-dust cover on the back of the combination lock. Align the old combination numbers to the guide points.
A base pair (bp) is a unit consisting of two nucleobases bound to each other by hydrogen bonds. They form the building blocks of the DNA double helix, and contribute to the folded structure of both DNA and RNA.
Base Pairing Principle: The Base Pairing Principle is: Complementary base pairs are: adenine and thymine (A - T ) guanine and cytosine (G - C) The base pairing is called complementary because there are specific geometry requirements in the formation of hydrogen bonds between the heterocylic amines.