Multiple choice

The heme is a deep red, nonprotein, ferrous component of hemoglobin. Its porphyrins consist of

  1. Benzene

  2. Pyrroles

  3. Carbazole

  4. 1-Methylindole
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pyrroles are components of more complex macrocycles, including the porphyrins of heme, the chlorins, bacteriochlorins, chlorophyll, porphyrinogens. Porphobilinogen, a trisubstituted pyrrole, is the biosynthetic precursor to many natural products such as heme.

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