Waste products of adenine and guanine metabolism are excreted by man as
A
Ammonia
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B
Urea
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C
Uric acid
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D
Allantois
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Solution
The correct option is B Uric acid Adenine and guanine are purines, and the final excretory product of purine metabolism in human is uric acid. Firstly, adenine and guanine are converted to xanthine. Enzyme xanthine oxidase exclusively found in liver and small intestines) then converts xanthine to uric acid.