(Image: Public Domain) Guanine has the chemical formula C₅H₅N₅O and a molecular weight of 151.13 g/mol. It is a polar molecule due to the presence of the carbonyl (C=O) and amino (NH₂) groups. The ...

Other combinations of the atoms form the four bases: thymine (T), adenine (A), cytosine (C), and guanine (G). These bases are the rungs of the DNA ladder. (It takes two bases to form a rung -- one ...

Because there are four naturally occurring nitrogenous bases, there are four different types of DNA nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C). Within double-stranded DNA ...

In DNA, adenine always pairs with thymine (A-T), and guanine always pairs with cytosine (G-C). These complementary base pairs form through hydrogen bonding, creating the iconic double helix structure ...