[A First Review of Basic Chemistry]

12. What is the importance of iron (Fe) in living cells?

A) Major component of the phosphate groups (PO4) of nucleic acids.

B) Major component of sugars.

C) Major component strengthening bones and teeth.

D) Needed to make hemoglobin, a molecule which carries oxygen in the blood.

E) Answers A, B & C.

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Slichter