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The rungs of the DNA ladder are made of complementary nitrogenous base pairs. DNA contains four different nitrogenous bases: adenine, thymine, cytosine and guanine. The nitrogenous bases are divided into the purines and ... More »

www.reference.com Science Biology Molecular Biology & DNA

The rungs of the DNA ladder consist of four nitrogenous bases: adenine, thymine, cytosine and guanine. Each rung of the ladder is composed of two of the nitrogenous bases held together by hydrogen bonds. More »

www.reference.com Science Biology Molecular Biology & DNA

The shape of a DNA molecule is called a double helix, which looks like a twisting ladder. The "rungs" are made from four nitrogenous bases: adenine, thymine, guanine and cytosine. Sugars and phosphate groups are also par... More »

www.reference.com Science Biology Molecular Biology & DNA
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The rungs of the DNA ladder consist of four nitrogenous bases: adenine, thymine, cytosine and guanine. Each rung of the ladder is composed of two of the nitrogenous bases held together by hydrogen bonds. More »

www.reference.com Science Biology Molecular Biology & DNA

The steps, or rungs, of the DNA ladder are made up of two bases joined together with either two or three weak hydrogen bonds. The rails of the ladder are made up of alternating sugar and phosphate molecules. The rungs ar... More »

www.reference.com Science Biology Molecular Biology & DNA

As shown on the NIH Genetics Home Reference site, when DNA molecules are represented as ladders, the rungs represent the base pairs of the DNA. The bases in DNA are often represented as G, A, T and C, which stand for gua... More »

www.reference.com Science Biology Molecular Biology & DNA

Deoxyribonucleic acid, or DNA, is composed of a 5-carbon sugar, a phosphate group and a nitrogenous base. The four nitrogenous bases found in DNA are adenine, guanine, thymine and cytosine. More »

www.reference.com Science Biology Molecular Biology & DNA