For a long time, Venus has been considered too hostile for life as we know it. Its thick clouds are filled with droplets of ...

called cytosine (C), occurs in both types of nucleic acid. A second pyrimidine, called thymine (T), only occurs in DNA, while the third type, uracil (U), only occurs in RNA. Nitrogenous bases are ...

Levene proposed that nucleic acids were composed of a series of nucleotides, and that each nucleotide was in turn composed of just one of four nitrogen-containing bases, a sugar molecule ...

In the late nineteenth century, a German biochemist found the nucleic acids, long-chain polymers of nucleotides, were made up of sugar, phosphoric acid, and several nitrogen-containing bases.

Punishing conditions in the clouds of Venus could be home to a DNA-like molecule capable of forming genes in life very ...

Kossel isolated cytosine from calf thymus tissues and found that it was a component of nucleic acids. This discovery, along with the identification of other nitrogenous bases, laid the foundation for ...

Nucleic acids are complex biological molecules that store and transmit ... In DNA, two complementary strands of nucleotides pair up through hydrogen bonds between the bases (A with T and G with C) to ...

Ribonucleic acid (RNA) is a form of nucleic acid ... deoxyribose), an attached phosphate group, and one of four nitrogenous bases. Three of these four nitrogenous bases—adenine, cytosine, ...

Because this truncated replication occurs over and over again, nucleic acids of varying lengths ... a sugar molecule, and a nitrogenous base. Because there are four naturally occurring nitrogenous ...

Urey figured that the trace oxygen, nitrogen ... revealed a way in which some compounds -- nucleic acids -- could replicate and keep life going. The base pairs within DNA, which actually transfer ...