Alternating deoxyribose and phosphate molecules.
protein
DNA (standing for DeoxyriboNucleic Acid)
There are four bases in a DNA "ladder"... It is called a ladder because of the "two sides" and the bases... In DNA replication, they obviously replicate and the two sides are replicated as are the bases. (A,T,C,G)
The outside is the sugar-phosphate 'back-bone', while the inside is where the four bases A T C & G meet to exchange their information.
Sugar molecules and phosphate groups
A DNA molecule consists of two strands that are made up of sugar (deoxyribose) and phosphate molecules. The sides of the DNA molecule are formed by alternating sugar and phosphate molecules linked together to create a backbone for the molecule.
The sides of the DNA ladder are alternating deoxyribose (sugar) molecules and phosphate molecules. The DNA bases attach to the sugar molecules.
A phosphate group bonded covalently to a sugar molecule.
Duplicated
phosphate
The sides of the DNA molecule are made up of repeating sugar-phosphate groups, not nitrogen bases. The nitrogen bases are arranged in the middle of the DNA molecule and form the rungs of the double helix structure.
The sides of a DNA molecule are made up of alternating sugar molecules (deoxyribose) and phosphate groups that form the sugar-phosphate backbone. Each sugar molecule is connected to one of four nitrogenous bases (adenine, thymine, cytosine, or guanine) that extend inward from the backbone and pair with a complementary base on the opposite strand.
The backbone of the DNA molecule is made up of a sugar (deoxyribose) bonded to a phosphate group bonded to another sugar and then another phosphate and so on. These are very strong covalent bonds that are not easily broken.
The sides of a DNA molecule are made up of alternating sugar (deoxyribose) and phosphate molecules, forming the backbone of the DNA strand. The bases (adenine, thymine, cytosine, and guanine) are attached to the sugar molecules and form the rungs of the ladder structure through hydrogen bonds.
The sides of the DNA latter consist of the sugar deoxyribose and phosphates. The bond between the latter and the nitrogen bases together is known a a nucleotide. Nucleotides are molecules that make up the structure of DNA and RNA.
protein
Phosphate and sugar make up the sides of a DNA ladder.