KROK 1 2010 – Question 6 · KROK (Medicine) · Biological Chemistry
Blood of a 12 year old boy presents low concentration of uric acid and accumulation of xanthine and hypoxanthine. This child has genetic defect of the following enzyme:
- A. Urease
- B. Arginase
- C. Glycerylkinase
- D. Ornithine carbamoyltransferase
- E. Xanthine oxidase
Hint
Follow purine catabolism step by step and ask which enzymatic step must be blocked for the intermediates to pile up while the final product falls.
The answer, the explanation and a note on every option are available once you log in. The account is free: topic tests, a mock exam, mistake review and statistics.
More questions on Biological Chemistry
- A patient is ill with diabetes mellitus accompanied by hyperglycemia on an empty stomach (7,2 millimole/l). The hyperglycemia rate can be…
- A patient has low rate of magnesium ions that are necessary for affixion of ribosomes to the endoplasmic reticulum. It is known that it causes…
- A full-term newborn child has yellowish skin and mucous membranes. This might be probably caused by temporary deficiency of the following enzyme:
- A patient ill with neurodermatitis has been taking prednisolone for a long time. Examination revealed high rate of sugar in his blood. This…
- Examination of a patient revealed typical presentations of collagenosis. This pathology is characterized by increase of the following urine index:
- Untrained people often have muscle pain after sprints as a result of lactate accumulation. This might be caused by intensification of the following…