KROK 1 2011 – Question 37 · KROK (Medicine) · Biological Chemistry

The greater amount of nitrogen is excreted from the organism in form of urea. Inhibition of urea synthesis and accumulation of ammonia in blood and tissues are induced by the decreased activity of the following liver enzyme:

  1. A. Carbamoyl phosphate synthetase
  2. B. Amylase
  3. C. Pepsin
  4. D. Urease
  5. E. Aspartate aminotransferase
Hint

Trace the route by which the liver converts ammonia to urea and ask which of the listed enzymes acts at the step where ammonia first enters it.

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