BCHM 551 Quiz 7 202030 Summer 2020 BCHM Answers- Liberty University

6/27/2020 Review Test Submission: Quiz 7 – 202030 Summer 2020 BCHM...


Question 1 1 out of 1 points
Which of these enzymes will exhibit a significantly diminished activity in a patient with deficiency
pyridoxine?
Selected Answer: ALA synthase




Question 2 1 out of 1 points
A common complication of hereditary hemochromatosis does not include;

Selected Answer: Cerberal aneurysm




Question 3 1 out of 1 points
An increase in serum iron level may result directly from;
Selected Answer: Decreased transferrin receptor expression




Question 4 1 out of 1 points
A 25 year old Liberty University student presents to the ER with complaints of recurrent episode of anxiety,
paranoia, confusion and abdominal pain. She has not experienced any rashes or photosensitivity but said
she noticed that her urine color was port-wine after she took a barbiturate her family doctor prescribed. She
is diagnosed with Acute intermittent Porphyria caused by a deficiency of;

Selected Answer: Uroporphyrinogen I syntahse




Question 5 1 out of 1 points
Which of these cellular functions is not affected by a defect in the heme synthesis pathway?

Selected Answer: Oxidation of proline




Question 6 1 out of 1 points
An increased urinary excretion of this form of vitamin D is indicative of excessive intake of vitamin D;
Selected Answer: 24,25-dihydrocholecalciferol




Question 7 1 out of 1 points
Which of these is not true about the biochemical significance of calcium in the human body?
Selected Answer: Involved in plasma membrane synthesis




Question 8 1 out of 1 points
The reaction catalyzed by ALA synthase in erythrocytes uses these as its substrates;
Selected Answer: Succinyl-CoA and glycine
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, 6/27/2020 Review Test Submission: Quiz 7 – 202030 Summer 2020 BCHM...



Question 9 1 out of 1 points
Which of these markers of bone activity do you suspect will be most indicative of increased osteoblastic
activity?
Selected Answer: Bone-specific alkaline phosphatase




Question 10 1 out of 1 points
A consequence of hypervitaminosis D includes;
Selected Answer: Calcinosis




Question 11 1 out of 1 points
In a patient diagnosed with hemochromatosis, which of these treatment options is least beneficial;
Selected Answer: Vitamin C supplementation




Question 12 1 out of 1 points
A patient with iron deficiency due to impaired intestinal absorption of elemental iron most likely has a defect
in these except;
Selected Answer: Ferritin




Question 13 1 out of 1 points
In the patient with elevated conjugated hyperbilirubinemia, which of these clinical/laboratory features is
most unlikely;
Selected Answer: Increased urinary urobilinogen




Question 14 1 out of 1 points
A patient with deficiency of this protein will be unable to convert ferrous iron into the ferric form on the
basolateral surface of enterocytes;
Selected Answer: Hephaestin




Question 15 1 out of 1 points
Which of these is least likely to alter the laboratory result of free calcium measurements?
Selected Answer: Blood sample stored with heparin as the anti-coagulant




Question 16 1 out of 1 points
A 45 year old Nigerian man developed pyridoxine deficiency and anemia secondary to Isonaizid therapy for
Tuberculosis. Which of these will you not expect to find in this man’s lab work?

Selected Answer: Decreased serum ferritin level
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