SAT Subject Biology Practice Question 121: Answer and Explanation

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Question: 121

11. Which biological molecule is associated with iron (Fe) ions?

A. Histone
B. Catalase
C. Chlorophyll
D. Hemoglobin
E. RNA polymerase

Correct Answer: D

Explanation:

Hemoglobin is a protein associated with iron ions. Iron deficiency can be a cause of anemia, or poor red blood cell function.

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