Nucleotide base - Wikipedia
Five nucleobases—adenine (A), cytosine (C), guanine (G), thymine (T), and uracil (U)—are called primary or canonical. They function as the fundamental units of the genetic code, with the …
11.1: Structure and Function - Nucleic Acids - Biology LibreTexts
2021年8月23日 · The nitrogenous bases found in nucleic acids include adenine and guanine (called purines) and cytosine, uracil, or thymine (called pyrimidines). There are two sugars …
5.11: Structure of Nucleic Acids - Biology LibreTexts
2021年2月28日 · RNA nucleotides also contain one of four possible bases: adenine, guanine, cytosine, and uracil (U) rather than thymine. Adenine and guanine are classified as purines. …
Chemical RNA Structure | Learn Science at Scitable
RNA consists of four nitrogenous bases: adenine, cytosine, uracil, and guanine. Uracil is a pyrimidine that is structurally similar to the thymine, another pyrimidine that is found in...
The 5 Kinds of Nucleotides - ThoughtCo
2019年12月9日 · Adenine binds with thymine (A-T) in DNA and with uracil in RNA (A-U). Guanine and cytosine complement each other (G-C). To form a nucleotide, a base connects to the first …
9.1 The Structure of DNA - Concepts of Biology - OpenStax
RNA nucleotides contain the nitrogenous bases adenine, cytosine, and guanine. However, they do not contain thymine, which is instead replaced by uracil, symbolized by a “U.” RNA exists …
28.1 Nucleotides and Nucleic Acids - Chemistry LibreTexts
2023年11月24日 · Nucleotides are composed of phosphoric acid, a pentose sugar (ribose or deoxyribose), and a nitrogen-containing base (adenine, cytosine, guanine, thymine, or uracil). …
1.2: Structure of DNA and RNA - Biology LibreTexts
DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are composed of two different classes of nitrogen-containing bases: the purines and pyrimidines. The most commonly occurring purines …
26.12: DNA and RNA - Chemistry LibreTexts
2022年9月21日 · The four bases of DNA are adenine, thymine, cytosine, and guanine, abbreviated A, T, C, and G respectively. In RNA, the base thymine is not found and is instead …
Base Pair - National Human Genome Research Institute
1 天前 · Attached to each sugar is one of four bases: adenine (A), cytosine (C), guanine (G) [GWA-NeeN] or thymine (T). The two strands are held together by hydrogen bonds between …