They may be similar, but they are totally different in structure. In tissues that do not carry out active de novo synthesis, maintenance of an adequate supply of adenine nucleotides: . Attached to each one of these sugars is a nitrogenous base that is composed of carbon and nitrogen rings. Answer: B. Purine and Pyrimidine Metabolism Quiz An infant is suffering from anemia with enlarged red blood cells. The correct answer is in bold. Study Flashcards On Biochemistry Exam 4 - Purine & Pyrimidine Metabolism at Cram.com. Purines consist of a six-membered and a five-membered nitrogen-containing ring, fused together. Some amino acids are necessary for purine synthesis. ANS: Transitions change a pyrimidine into a pyrimidine or a purine into a purine. There are 4 purines and 4 pyrimidines that are of concern to us. Popular Quizzes Today. About this Quiz. This quiz tests how much you know about essential DNA biochemistry, including the shape of deoxyribonucleic acid and its bases. 3. US States Double Border Blitz Map 11,518; 5x5 in 90: Mixed Holiday Minefield Blitz 10,375; Find the US States - No Outlines Minefield 7,910; Hide Europe's Flags (Minefield) 6,725 Click the 'J' Movie Title Character 6,287; More Quizzes Overview. What are Purines and Pyrimidines? A. occurs primarily by adenine salvage using A-PRT. There are two kinds of nitrogen-containing bases - purines and pyrimidines. Each DNA strand has a ‘backbone’ that is made up of a sugar-phosphate chain. Purines are made up of 2 Carbon nitrogen rings. A. covalently bonded to a sugar B. ionically bonded to a sugar C. hydrogen bonded to a sugar D. none of the above. Return to Question Document. The bases in the DNA helix are bound to each other via: hydrogen bonds covalent bonds ionic bonds metallic bonds 6. Cram.com makes it easy to get the grade you want! Question 1 of 16. There is a printable worksheet available for download here so you can take the quiz with pen and paper.. This is an online quiz called Purine and Pyrimidine Constituents. Large fragments B. Pyridmidines have only a six-membered nitrogen-containing ring. A. Ammonia B. Carbamoyl phosphate C. Folate D. ... purine and pyrimidine bases 5. The molecular formula of purine is C5H4N4. A. Transitions and transversions are equally likely B. Guanine is a purine and the purine ring is excreted as uric acid. 5. The number of rings this base has determines whether the base is a purine (two rings) or a pyrimidine (one ring). : The Basics. This quiz has tags. In gel electrophoresis, what fragments will move most quickly through a gel? Click on the tags below to find other quizzes on the same subject. Small fragments C. Large genome D. None of these. Only the pyrimidine ring is cleaved. Quickly memorize the terms, phrases and much more. Purines and pyrimidine are nitrogenous bases found in DNA and RNA. 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