According to HowStuffWorks, cytosine always pairs with guanine. The other two bases that pair together are thymine and adenine. These four bases make up nucleotides and are the building blocks of nucleic acids like DNA.Continue Reading
Cytosine is a nitrogenous base called a pyrimidine, states HowStuffWorks. Of the four bases, two are pyrimidines, single-ringed structures, and two are purines, double-ringed structures. When they bond, one pyrimidine always pairs with one purine.
HowStuffWorks goes on to explain that each nucleotide has a nitrogenous base, like cytosine, a sugar and a phosphate group. One nitrogenous base is paired with another that has its own phosphate and sugar. Then the phosphate molecule in each nucleotide binds to the sugar in the next nucleotide, which creates a long strand.
The National Center for Biotechnology Information says that cytosine has the molecular formula of C4H5N3O. Cytosine was first discovered in 1894 by Albrecht Kossel, according to Wikipedia. It is an important part of DNA and RNA, but it is also a part of converting adenosine diphosphate to adenosine triphosphate. The cytosine gives a phosphate to ADP for the conversion to ATP, a process that is an important component of energy cycle in cells, according to Brooklyn College.Learn more about Molecular Biology & DNA
DNA stores information in a sequence of adenine, cytosine, guanine and thymine on a backbone of two deoxyribose molecules, which intertwine in a double helix. In nature, this information is read by RNA molecules and turned into proteins.Full Answer >
Ribonucleic acid, known as RNA, is composed of a combination of four different nucleotides: adenine, uracil, guanine and cytosine. Each nucleotide primarily consists of a ribose sugar (five-carbon ring) and a phosphate group.Full Answer >
Nitrogenous bases are the class of biological molecule to which guanine, adenine, cytosine and thymine belong. These nitrogenous bases combine with a five-carbon sugar and a phosphate group to form nucleic acids such as DNA and RNA.Full Answer >
The complementary base pairing rule states that in DNA, adenine always pairs with thymine and guanine pairs with cytosine. This rule ensures that DNA is replicated faithfully and mutations are minimal occurrences.Full Answer >