Basically, their structure and geometry. Some of them "fit" together nicely with favorable hydrogen bonding interactions, and others don't.
The center of the helix of DNA contains pairs of nitrogenous bases, not nitrogen atoms. These bases are adenine-thymine and guanine-cytosine, which form the genetic code necessary for the functioning of living organisms.
Hydrogen bonds hold the bases together in pairs in DNA. These bonds form between the nitrogenous bases adenine and thymine, and guanine and cytosine in a complementary manner, contributing to the overall stability and structure of the DNA molecule.
DNA is composed of nucleotides which contain the 5-carbon sugar deoxyribose, a phosphate molecule, and one of four nitrogen bases: adenine, thymine, guanine, and cytosine. These nucleotides form two strands of DNA which twist around one another to form a double helix. The sequence of the nitrogen bases determines a cell's structure and function, and determines heredity.
Adenine and Guanine are the two purines used as nitrogen bases in nucleotides. They form complementary base pairs with thymine and cytosine in DNA and with uracil and cytosine in RNA.
Nitrogen base pairs are located in between the (S-P) backbones. Here, S-P stands for sugar and phosphate. The frame or backbone along which nitrogen bases are paired provides the mechanical support and protection to the base pairs.In DNA the sugar found is deoxyribose. And the nitrogen bases are paired in a way that only the bases with the first significant letter rounded have pairs with each other. Similarly, those with non-rounded alphabet e.g. Adenine(A) and Thymine(T) have pairs with each other. A and T are paired up by two hydrogen bonds and C and G are paired up by three hydrogen bonds
sex
The two chains are connected by hydrogen bonding between nitrogen bases to form a long double-stranded molecule.So hydrogen bonding determines which nitrogen bases form pairs of DNA.
The center of the helix of DNA contains pairs of nitrogenous bases, not nitrogen atoms. These bases are adenine-thymine and guanine-cytosine, which form the genetic code necessary for the functioning of living organisms.
Nitrogen bases in DNA bond together through hydrogen bonds. Adenine pairs with thymine through two hydrogen bonds, while guanine pairs with cytosine through three hydrogen bonds. These base pairs form the rungs of the DNA ladder structure.
hydrogen bonds
Nitrogen bases form together through hydrogen bonding between complementary bases (adenine with thymine, and cytosine with guanine). This base pairing allows for the formation of a stable double helix structure in DNA.
DNA:Guanine-CytosineAdenine-ThymineRNA:Guanine-CytosineAdenine-Uracil
Hydrogen bonds hold the bases together in pairs in DNA. These bonds form between the nitrogenous bases adenine and thymine, and guanine and cytosine in a complementary manner, contributing to the overall stability and structure of the DNA molecule.
Complementary nitrogen bases pair by means of hydrogen bonds. Refer to the related link below for an illustration.
DNA is composed of nucleotides which contain the 5-carbon sugar deoxyribose, a phosphate molecule, and one of four nitrogen bases: adenine, thymine, guanine, and cytosine. These nucleotides form two strands of DNA which twist around one another to form a double helix. The sequence of the nitrogen bases determines a cell's structure and function, and determines heredity.
The rungs of the ladder are pairs of 4 types of nitrogen bases (thymines, adenines, guanines, cytosines).---The pairs are guanine and cytosine (G-C), or adenine and thymine (A-T).The rungs of the dna ladder are made of alternating sugars and phosophate groups.
In DNA, nitrogen bases (adenine, thymine, cytosine, and guanine) form sentences by pairing up in specific complementary ways. Adenine always pairs with thymine, and cytosine always pairs with guanine through hydrogen bonding. These base pairs form the "words" of the genetic code that are read by cellular machinery to produce proteins.