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.
Strength Edit. Base pairs vary in strength. The GC pair is stronger than AU or GU pairs due to the presence of an additional hydrogen bond and stronger stacking interactions. Additionally, the energy of a base pair can be altered by exchanging the positions of two paired bases.he GC pair is stronger than AU or GU pairs due to the presence of an additional hydrogen bond and stronger stacking interactions. Additionally, the energy of a base pair can be altered by exchanging the positions of two paired bases.