鹼基對（base pair）是雙鏈核酸的基本組成單位，由兩個核鹼基通過氫鍵相互結合而成；它們形成了DNA雙螺旋的結構單元，並促成DNA和RNA的摺疊結構。鹼基對也是編碼遺傳信息的化學結構。

The chemical structure of DNA base-pairs . A base pair (bp) is a fundamental unit of double-stranded nucleic acids consisting of two nucleobases bound to each other by hydrogen bonds. They form the building blocks of the DNA double helix and contribute to the folded structure of both DNA and RNA.

碱基对（base pair）是双链核酸的基本组成单位，由两个核碱基通过氢键相互结合而成；它们形成了DNA双螺旋的结构单元，并促成DNA和RNA的折叠结构。碱基对也是编码遗传信息的化学结构。

5 天之前 · The rules of base pairing explain the phenomenon that whatever the amount of adenine (A) in the DNA of an organism, the amount of thymine (T) is the same (called Chargaff's rule). Similarly, whatever the amount of guanine (G), the amount of cytosine (C) is the same.

The ability of nucleobases to form base pairs and to stack one upon another leads directly to long-chain helical structures such as ribonucleic acid (RNA) and deoxyribonucleic acid (DNA). Five nucleobases—adenine (A), cytosine (C), guanine (G), thymine (T), and uracil (U)—are called primary or canonical.

2018年9月24日 · Adenine and thymine form two complementary hydrogen bonds to form the A:T base pair (A), whereas guanine and cytosine form three complementary hydrogen bonds to form the G:C base pair (B). Both the A:T and G:C base pairs have the same width, as shown in orange.

碱基对，是一对相互匹配的碱基（即A—T， G—C，A—U相互作用）被氢键连接起来。 它常被用来衡量DNA和RNA的长度（尽管RNA是单链）。 它还与核苷酸互换使用，尽管后者是由一个五碳糖、磷酸和一个碱基组成。

1 天前 · A base pair consists of two complementary DNA nucleotide bases that pair together to form a “rung of the DNA ladder.” DNA is made of two linked strands that wind around each other to resemble a twisted ladder — a shape known as a double helix. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.

2024年9月30日 · The two strands are complementary rather than identical and are held together by hydrogen bonds between specific pairs of bases, A with T and C with G. That is, whenever an A base occurs in one strand, a T base occurs opposite it in the other strand; when a C base occurs in one, a G occurs in the other (Figure \(\PageIndex{1}\)). This ...

Base Pairs. The genetic code, or DNA sequence, is usually represented as a string of letters. There are only four available letters: A, T, C, and G. Each of these letters represents a base or a single rung along the genetic ladder. From just a small number of base pairs, we can make an endless number of proteins. How can we do that?