Chemical structure of guanine, showing its double-ring purine structure and the functional groups involved in hydrogen bonding with cytosine. (Image: Public Domain) Guanine has the chemical formula ...

Credit: Kateryna Kon/Science Photo Library/ What is DNA, and how does it work? You don't need a degree in ...

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 ...

The DNA molecule is made up of four bases -- adenine (A), cytosine (C), guanine (G), and thymine (T). Each rung of the DNA ladder consists of two bases. In the DNA molecule, A always pairs up with ...

“Being able to extend [base editing] to other types is really quite important.” Traditional CRISPR-Cas9 genome editing makes a double-stranded break in DNA in order to introduce insertions or ...

Traits as diverse as the color of a person's eyes and the scent of a rose are determined by the information contained in DNA. Learn how this information is coded by strings of molecules called ...

There are four types of base - adenine, thymine, cytosine and guanine. All human cells contain DNA. The 3 billion pairs of bases in each cell fit into a space that is six microns across.

This specific pairing is known as complementary base pairing and is essential for the stability and replication of DNA. The thymine-adenine (T-A) base pair is held together by fewer hydrogen bonds ...

and they involve the swapping of one nucleotide for another during DNA replication. For example, during replication, a thymine nucleotide might be inserted in place of a guanine nucleotide.