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.
A base pair is made of two nucleotides. The nucleotides, located on opposite strands of DNA or RNA, are drawn to each other in a hydrogen bond. These bonds are what hold the strand together in a double helix formation. The double structure is a redundancy that acts as a backup system to store genetic information. Base pairs facilitate transcription, which is the process whereby genetic information encoded in DNA is transferred to RNA. The information is carried in only one of the two strands of DNA, which is called the coding strand.