BIOCHEM 551 Quiz 7 Re-Updated- Louisiana University

Quiz 7 BIOM 551
 Question 1
1 out of 1 points
An increased urinary excretion of this form of vitamin D is indicative of
excessive intake of vitamin D;
Selected 24,25-dihydrocholecalciferol
Answer:

 Question 2
1 out of 1 points
In the patient with elevated conjugated hyperbilirubinemia, which of these
clinical/laboratory features is most unlikely;
Selected Increased urinary
Answer:
urobilinogen
 Question 3
1 out of 1 points
A patient presents with jaundice due to elevated conjugated
hyperbilirubinemia, which is an unlikely cause of this patient s condition?
Selected Neonatal physiologic jaundice
Answer:

 Question 4
1 out of 1 points
The reaction catalyzed by ALA synthase in erythrocytes uses these as its
substrates;
Selected Succinyl-CoA and
Answer:
glycine
 Question 5
1 out of 1 points
This amino acid is crucial to the initiation of the heme synthesis pathway?


Selected Glycin
Answer: e

 Question 6
1 out of 1 points
In a patient diagnosed with hemochromatosis, which of these treatment
options is least beneficial;
Selected Vitamin C supplementation
Answer:

 Question 7
1 out of 1 points
Which of these enzymes will exhibit a significantly diminished activity in a
patient with deficiency pyridoxine?

, Selected ALA synthase
Answer:

 Question 8
1 out of 1 points
A patients liver biopsy shows increased deposition of hemosiderin and ferritin
which confirm a diagnosis of hemochromatosis. Which of these is least likely
to be the casue of this condition?
Selected Prolonged oral iron supplementation
Answer:

 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 Bone-specific alkaline phosphatase
Answer:

 Question 10
1 out of 1 points
In a patient with a homozygous defect in the HFE gene, which of these
endocrine abnormalities is an unusual finding;
Selected Hypoparathyroidism
Answer:

 Question 11
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 Hephaestin
Answer:

 Question 12
1 out of 1 points
The main circulating form of Vitamin D in the body is;
Selected 25-hydrocholecalciferol
Answer:

 Question 13
1 out of 1 points
You are in a laboratory medicine rotation at Lynchburg General Hospital and you
are asked to predict the clinical features of this patient whose urine sample show
a significant elevation in porphyrinogens but not ALA or PBG. Your prediction will
be;


Selected Photosensitivity and skin
Answer: rashes

 Question 14