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67 Chapter Hematological Disorders (1 of 57) Sample Questions

1. Which of the following plasma glycoproteins controls the levels of the free iron in biological fluids?

A. Total iron binding capacity
B. Transferrin protein
C. Serum ferritin
D. Hemoglobin
E. Myoglobin

Ans: B

Tips: "Transferrin" and "free transferrin" refer to the same protein but under different conditions.
Transferrin is a blood plasma protein that binds and transports iron in the body. It is responsible for carrying iron through the bloodstream to cells that need it for various metabolic processes. When transferrin is bound to iron, it is often referred to as "iron-bound transferrin."
However, "free transferrin" typically refers to the unbound or unoccupied transferrin, which is not currently carrying or bound to iron. This unbound transferrin is available to bind to and transport iron when necessary. The distinction between transferrin and free transferrin is based on whether the protein is actively bound to iron or is in its unbound state, ready to bind iron.

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