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The sides or railings of DNA are made up of alternating sugar (deoxyribose) and phosphate molecules, forming the backbone of the DNA molecule. The rungs or steps of DNA are made up of nitrogenous bases (adenine, thymine, cytosine, and guanine) which form hydrogen bonds to connect the two strands of the DNA molecule in a complementary manner.
In the Watson and Crick model of DNA, the steps of the ladder are composed of nucleotides. Each nucleotide consists of a sugar molecule (deoxyribose), a phosphate group, and one of four nitrogenous bases: adenine (A), thymine (T), guanine (G), or cytosine (C). These nucleotides are linked together through phosphodiester bonds to form the backbone of the DNA molecule.
Molecules. DNA is a big molecule made by smaller molecules. http://en.wikipedia.org/wiki/DNA
guanine, cytosine, thymine, adenine.
You are probably thinking of DNA. The base pairs link the two strands together like a series of steps. However, since it is helical, it might be more accurate to compare it to a spiral staircase.
The sides or railings of DNA are made up of alternating sugar (deoxyribose) and phosphate molecules, forming the backbone of the DNA molecule. The rungs or steps of DNA are made up of nitrogenous bases (adenine, thymine, cytosine, and guanine) which form hydrogen bonds to connect the two strands of the DNA molecule in a complementary manner.
Look in a science book
nitrogenous bases
DNA
In the Watson and Crick model of DNA, the steps of the ladder are composed of nucleotides. Each nucleotide consists of a sugar molecule (deoxyribose), a phosphate group, and one of four nitrogenous bases: adenine (A), thymine (T), guanine (G), or cytosine (C). These nucleotides are linked together through phosphodiester bonds to form the backbone of the DNA molecule.
a DNA molecule is made up of a phosphate, sugar and base A double Helix Strand
A chromatid contains one DNA molecule, which is a duplicated chromosome consisting of two identical sister chromatids.
A DNA molecule is formed by a sequence of nucleotides arranged in a double helix structure. Each nucleotide consists of a phosphate group, a sugar molecule (deoxyribose), and one of four nitrogenous bases (adenine, thymine, cytosine, or guanine). The steps of the DNA molecule are created by the pairing of complementary bases: adenine pairs with thymine, and cytosine pairs with guanine.
Molecules. DNA is a big molecule made by smaller molecules. http://en.wikipedia.org/wiki/DNA
guanine, cytosine, thymine, adenine.
A DNA molecule is made up of deoxyribose sugar while RNA is made up of ribose sugar. A DNA molecule is double stranded whilst a RNA molecule is single stranded. A DNA molecule only contains the bases; Adenine, Thymine, Cytosine and Guanine. However a RNA molecule contains the bases; Uracil, Thymine, Cytosine and Guanine. DNA is only found in the nucleus of a cell, while RNA is found in the cytoplasm.
DNA