![]() ![]() ![]() The backbone of DNA is made up of phosphate molecules that form bonds between ribose sugars (through condensation reactions) to link monomers together to form a long polymer strand.ĭNA: Deoxyribonucleic acid, the genetic material found within the cell nucleus.DNA nitrogenous bases are important in bonding two strands together to form the double helix using weak intermolecular hydrogen bonding forces.Nitrogenous Bases The four nucleotides found in DNA differ only in their. The phosphate groups form bonds between the 3rd carbon (3’) of the ribose sugar of one base and the 5th carbon (5’) of the ribose sugars of the other base, forming the phosphate backbone of a DNA strand.Īpplications of Hard-Soft Acid-Base theory A nucleotide has three components: a sugar, a phosphate group, and a nitrogenous base. The nitrogen bases form the double-strand of DNA through weak hydrogen bonds. The chemistry of the phosphate groups forms another important part of the DNA structure, joining together the ribose sugars and bases to form a polymer with phosphodiester bonds. Guanine binds to Cytosine via 3 hydrogen bonds, as shown below, whereas Adenine binds to Thymine via 2 hydrogen bonds. These bases match up in complementary pairs due to the number of hydrogen bonds and relative sizes of the bases. phosphate, sugar, ond nitrogen base units. These hydrogen bonds form between the amino groups on one base and the amino or carbonyl groups on the adjacent nitrogenous base. Transcribed Image Text: The backbone of a strand of nuclelc acid consists of Multiple Choice phosphate units only sugar units only. The nitrogenous bases of one strand in the double-stranded structure form hydrogen bonds to the other strand to form a double helix. As a polymer, DNA is made up of nucleotide monomers which each contain a nitrogenous base, ribose sugar, and phosphate group. The sugar and phosphate lie on the outside of the helix, forming the backbone of the DNA. DNA is a nucleic acid that contains monomer nucleotide units formed into a polymer and is held in a double helix structure by hydrogen bonding between nitrogenous bases of the two antiparallel strands.ĭNA contains a large range of important chemical concepts. What is a nucleotide Building blocks of nucleic acid. ![]()
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