Nitrogenous bases are categorized into two groups: pyrimidines (cytosine, thymine, and uracil) and purines (adenine and guanine).
the nitrogenous base which has double ring structure is purine.it consist two bases adenine and guanine;
purines
Four, out of whish 2 purines and two pyremidines
A DNA molecule consists of two strands that are made up of nucleotides. Each nucleotide is composed of a sugar molecule, a phosphate group, and one of four nitrogenous bases (adenine, thymine, cytosine, or guanine). The two strands are connected by hydrogen bonds between complementary nitrogenous bases.
The two chemicals that form the outer parts of the DNA molecule are deoxyribose sugar and phosphate groups. These molecules form the backbone of the DNA double helix structure, with the nitrogenous bases positioned in between them.
Purines and Pyrimidines
The two nitrogenous bases that are purines are adenine and guanine.
Adenine and Guanine are the two classes of nitrogenous bases that belong to purines.
two
the nitrogenous base which has double ring structure is purine.it consist two bases adenine and guanine;
The two classes of nitrogenous bases are purines and pyrimidines. Purines include adenine and guanine, while pyrimidines include cytosine, thymine, and uracil.
purines
Four, out of whish 2 purines and two pyremidines
The two chemical groups that form the backbone of a DNA strand are deoxyribose sugar and phosphate groups. These components link together to form a sugar-phosphate backbone, with nitrogenous bases attached to the deoxyribose sugar.
Nitrogenous bases form hydrogen bonds with one another. These hydrogen bonds are responsible for holding the two strands of DNA together in the double helix structure.
The category of nitrogen bases that consists of two rings is the purines.A nitrogenous base is an organic compound that owes its property as a base to the lone pair of electrons of a nitrogen atom. Notable nitrogenous bases include purines.Purines have two fused rings of carbon and nitrogen atoms.
Hydrogen bonds form between two nitrogenous bases. These bonds are relatively weak compared to covalent bonds, allowing the DNA double helix to unzip during processes like replication and transcription.