Each of these things — along with every other organism on Earth — contains the molecular instructions for life, called deoxyribonucleic acid or DNA ... chemical bonds called hydrogen bonds.

Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between ... strand, DNA polymerase wraps itself around that strand, and it attaches new nucleotides to the exposed ...

Nucleotides are the combination ... because they require more energy to sunder, DNA strands are held together by delicate hydrogen bonds between the bases in a base pair. The "double helix ...

RNA polymerase moves along the DNA strand. Free RNA nucleotides form hydrogen bonds with the exposed DNA strand nucleotides by complementary base pairing to form a strand of mRNA: Note - RNA ...

The thymine-adenine (T-A) base pair is held together by fewer hydrogen bonds compared to the guanine ... DNA polymerase enzymes use the existing DNA strand as a template and add the complementary ...

In DNA, adenine pairs with thymine (T) through two hydrogen bonds, while in RNA ... purines are involved in various cellular metabolic processes. Purine nucleotides, such as ATP and GTP, serve as ...