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 pair. Base pair. (Science: molecular biology) two nitrogenous bases (adenine and thymine or guanine and cytosine) held together by weak bonds. two strands of dna are held together in the shape of a double helix by the bonds between base pairs.