Question

which of the following is the intracellular protein that is considered the storage form of iron?
a) ferritin
b) serum iron
c) transferrin
d) hemosiderin

Explanation:

• Ferritin: It is an intracellular protein that stores iron within cells. It plays a crucial role in iron metabolism by sequestering iron to prevent its toxic effects (such as oxidative damage) while making it available for cellular use when needed.
• Serum iron: This is the amount of iron present in the blood serum. It is not a protein but rather free - form iron in the circulation.
• Transferrin: It is a plasma protein (not intracellular) that binds to iron and transports it in the blood. It is involved in the distribution of iron to different tissues rather than storage.
• Hemosiderin: It is a breakdown product of ferritin. It is formed when there is an excess of iron in the cells. It is less soluble and less readily available for use compared to ferritin.

Answer:

A. Ferritin