KROK 1 2020 – Question 61 · KROK (Medicine) · Biological Chemistry
A patient complains of stomachache. Biochemical testing revealed decreased secretory function of the stomach accompanied by anemia. Hypovitaminosis B12 and development of anemia are caused by the low levels of a certain substance. What substance is it?
- A. Biotin
- B. Thiamine
- C. Castle factor
- D. Pyridoxine
- E. Calciferol
Hint
Ask which product of the gastric lining the vitamin needs in order to be absorbed, and whether the other substances listed share that dependence.
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
- Vitamin B1 deficiency impairs oxidative decarboxylation of alpha-ketoglutaric acid, which leads to disturbed synthesis of a certain coenzyme. Name…
- Electrons release their energy, when they are being transported in the course of tissue respiration. This energy is used for the following process:
- An infant developed darkened sclerae, mucosa, and auricles. The urine becomes dark, when exposed to the air. Blood and urine contain homogentisic…
- 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…
- 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…