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What is the definition of nitrogen bases in a DNA structure?

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A nitrogenous base is simply a molecule that contains nitrogen and has the chemical properties of a base. There are two kinds of nitrogenous bases present in DNA and RNA: pyrimidine bases and purine bases. The pyrimidine bases are cytosine, thymine (DNA only) and uracil (RNA only). read more

Nitrogen bases bind to complementary bases in DNA and RNA. Shunyu Fan / Getty Images Nitrogen Base or Nitrogenous Base Definition. A nitrogenous base is an organic molecule that contains the element nitrogen and acts as a base in chemical reactions. The basic property derives from the lone electron pair on the nitrogen atom. read more

Nitrogenous Base: Definition & Pairs. A nitrogenous base is simply a nitrogen-containing molecule that has the same chemical properties as a base. They are particularly important since they make up the building blocks of DNA and RNA: adenine, guanine, cytosine, thymine and uracil. read more

Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code. read more

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