In the Presence of Low Intracellular Iron, the Binding of Iron

question 21

Multiple Choice

In the presence of low intracellular iron, the binding of iron regulatory protein (IRE-BP) to iron response elements (IRE) present on the ferritin mRNA:

• A) results in a decrease in ferritin abundance.
• B) results in an increase in ferritin abundance.
• C) occurs only when intracellular iron concentrations are high.
• D) doesn't occur.

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