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Test: Exam 1 - Purines & Pyrimidines. Name: Score: 107 Multiple choice questions. Term. What are the purines found in both DNA and RNA? Adenylosuccinate lyase. Adenosine -> inosine reaction. Cytosine and Uracil. Adenine and Guanine. 1 of 107. Term. What are the pyrimidines found in DNA? Adenosine -> inosine reaction. At position 9 of purines.
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9 Νοε 2023 · The purine base adenine is found in both DNA and RNA, where it pairs with thymine (in DNA) or uracil (in RNA) via hydrogen bonds. In contrast, pyrimidines have a single-ring structure. Cytosine and thymine are pyrimidine bases found in DNA, while uracil is a pyrimidine base found in RNA.
DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are composed of two different classes of nitrogen-containing bases: the purines and pyrimidines. The most commonly occurring purines in DNA are adenine and guanine: Figure 1.2.1: Purines. The most commonly occurring pyrimidines in DNA are cytosine and thymine: Figure 1.2.2: Pyramidines
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29 Μαρ 2021 · Purines & Pyrimidines. The nitrogenous base molecules that are found in the nucleotides of DNA (A, T, C, G) and RNA (A, U, C, G) occur in two structural forms: purines and pyrimidines. The bases adenine and guanine are purines – they have a double ring structure.