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Xanthine: Quiz


Question 1: Derivatives of xanthine, known collectively as xanthines, are a group of alkaloids commonly used for their effects as mild stimulants and as bronchodilators, notably in treating the symptoms of ________.
AsthmaFarmer's lungAllergic bronchopulmonary aspergillosisHypersensitivity pneumonitis

Question 2:
What is the chemical name of Xanthine (IUPAC)
1,3-dimethyl-7H-purine-2,6-dione : 2-amino-2-methylpropan-1-ol

Question 3: [7][8][9][10][11][12][13][14][15][16][17][18][19] Xanthines are also found very rarely as constituents of ________.
Nucleic acid analoguesDNARNANucleic acid

Question 4: In contrast to other, more potent stimulants, they only inhibit the actions of sleepiness-inducing ________, making them somewhat less effective as stimulants than sympathomimetic amines.
Adenosine diphosphateAdenosine triphosphateAdenosine monophosphateAdenosine

Question 5: Xanthine is subsequently converted to ________ by the action of the xanthine oxidase enzyme.
Uric acidOrotic acidUridine monophosphateCarbamoyl phosphate

Question 6: A number of mild stimulants are derived from xanthine, including ________ and theobromine.

Question 7: nonselective adenosine receptor antagonists [6] which inhibit sleepiness-inducing ________.
AdenosineAdenosine monophosphateAdenosine diphosphateAdenosine triphosphate

Question 8: ________ xanthines include caffeine, aminophylline, IBMX, paraxanthine, pentoxifylline [2], theobromine, and theophylline.
MethylationAcetylationPosttranslational modificationAmino acid

Question 9: People with the rare ________ xanthinuria lack sufficient xanthine oxidase and cannot convert xanthine to uric acid.
Androgen insensitivity syndromeEpisodic ataxiaGenetic disorderAlport syndrome


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