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 Table of Contents  
Year : 2013  |  Volume : 25  |  Issue : 3  |  Page : 164-0

MCQ Questions and answers

Date of Web Publication2-Jul-2014

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Source of Support: None, Conflict of Interest: None

DOI: 10.7123/01.EJIM.0000433329.92031.29

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How to cite this article:
. MCQ Questions and answers. Egypt J Intern Med 2013;25:164

How to cite this URL:
. MCQ Questions and answers. Egypt J Intern Med [serial online] 2013 [cited 2020 Oct 27];25:164. Available from: http://www.esim.eg.net/text.asp?2013/25/3/164/135860

(1) Niacin (nicotinic acid):

  1. Is an organic compound.
  2. Is a B vitamin known as vitamin B3 or vitamin PP.
  3. Helps keep the nervous system, digestive system, skin, hair, and eyes healthy.
  4. All of the above.

(2) Niacin:

  1. Is a derivative of pyridine.
  2. Can be synthesized by the body from the amino acid tryptophan.
  3. Is a precursor to NAD and NADP.
  4. All of the above.

(3) The classic niacin deficiency disease is called:

  1. Pellagra.
  2. Scurvy.
  3. Beriberi.
  4. Night blindness.

(4) Individuals at risk of niacin deficiency include:

  1. Patients with HIV/AIDS or chronic alcoholism.
  2. Patients with Hartnup’s disease.
  3. Those who eat high amounts of refined foods.
  4. All of the above.

(5) Niacin is involved in:

  1. DNA repair.
  2. Production of steroid hormones.
  3. Converting carbohydrates into energy.
  4. All of the above.

(6) Niacin in a therapeutic dose could:

  1. Elevate HDL and decrease total cholesterol levels.
  2. Cause renal stone formation.
  3. Cause vasoconstriction.
  4. All of the above.

(7) The best food sources of niacin include:

  1. Foods high in proteins, such as poultry, fish, and beef.
  2. Peanut butter and fortified cereals.
  3. Brewer’s yeast.
  4. All of the above.

(8) With regard to Niacin:

  1. Mild deficiency causes an increased metabolism.
  2. Severe deficiency causes flushing.
  3. Pharmacological doses may lead to liver toxicity.
  4. All of the above.

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