Porphyrins and Nucleic Acid Metabolism Quiz

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Questions and Answers

Where does heme biosynthesis take place?

  • Mature red blood cells
  • Hepatocytes
  • Erythrocyte-producing cells in the bone marrow (correct)
  • Spleen

Which type of porphyrins are normally important for humans?

  • Type IV
  • Type I
  • Type III (correct)
  • Type II

Which metal ions readily bind to porphyrins?

  • Copper and zinc ions
  • Ferrous and ferric ions (correct)
  • Calcium and magnesium ions
  • Sodium and potassium ions

Which side chains are present in Protoporphyrin IX?

<p>Methyl, Vinyl, and Propionate (B)</p> Signup and view all the answers

What percentage of heme proteins is synthesized by hepatocytes?

<p>15% (A)</p> Signup and view all the answers

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