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Excretory Products and Their Elimination question

2005 · Q7
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Excretory Products and Their Elimination question

2005 · Q7

NEETBiologyExcretory Products and Their EliminationMCQ+4 / −1
In ornithine cycle, which of the following wastes are removed from the blood?
  1. A
    CO2 and urea
  2. B
    Ammonia and urea
  3. C
    CO2 and ammonia
  4. D
    Urea and urine
View written solutionFree

Correct answer: C

Urea NH2 – CO – NH2 is formed from two molecules of ammonia and one molecule of carbon dioxide. A molecule of ammonia combines with carbondioxide to form carbonyl phosphate. It reacts with ornithine to form citrulline. Citrulline accepts another molecule of NH4 + giving rise to arginine. Arginine is hydrolysed into urea and ornithine with the help of enzyme arginase.

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