What Is the Most Common Cause of Vitamin K Deficiency

question 36

Multiple Choice

What is the most common cause of vitamin K deficiency?

• A) Administration of warfarin (Coumadin)
• B) Total parenteral nutrition (TPN)with antibiotic therapy
• C) An immunoglobulin G (IgG)-mediated autoimmune disorder
• D) Liver failure

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Definitions:

Introgression

The transfer of genetic material from one species to another through hybridization and backcrossing, leading to the incorporation of foreign genes into a population.

Synonymous Substitution Rate

The rate at which point mutations occur in a DNA sequence that do not alter the encoded amino acid due to the redundancy of the genetic code.

Purifying Selection

Removes deleterious alleles from a population. It is a common form of stabilizing selection.