KROK 1 2020 – Question 75 · KROK (Medicine) · Biological Chemistry
Mother of a 5-year-old child complains that her child develops itching skin, erythema, and vesicular rash after exposure to the sun. Blood test revealed low levels of iron in the blood serum. Urine contains increased levels of uroporphyrinogen I. What hereditary pathology is the most likely in this child?
- A. Coproporphyria
- B. Erythropoietic porphyria
- C. Intermittent porphyria
- D. Hepatic porphyria
- E. Methemoglobinemia
Hint
Combine the early-childhood photosensitivity with the isomer type of the heme precursor in the urine and ask which enzyme step of heme synthesis has failed.
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
- After eating raw eggs the patient developed dermatitis. What type of avitaminosis is it?
- Blood of a patient with bladder cancer has high levels of serotonin and hydroxyanthranilic acid, because of excessive intake of a certain amino…
- The patient underwent blood test that showed albumin of 20 g/L and increased activity of lactate dehydrogenase isoenzyme 5 (LDH5). These results…
- A 60-year-old man complains of pain in his lower abdomen and frequent stools. Stool analysis shows increased levels of neutral fats in the patient’s…
- A child has cataract, delayed mental development, and enlarged liver. The doctor suspects these signs are caused by the deficiency of…
- A test animal kept on a low-protein diet developed fatty infiltration of the liver due to low levels of methylating agents. What amino acid is a…