A) heme has iron and no phytol tail
B) heme has iron and a phytol tail
C) heme has magnesium and no phytol tail
D) heme has magnesium and a phytol tail.
Correct Answer: A
Solution :
: Chlorophyll molecule has a complex porphyrin ring (head) to which is attached a long hydrophobic phytol chain (tail). The porphyrin ring is composed of four pyrrole nuclei linked together bearing side chains. The metal constituent of the molecule, the magnesium, is incorporated in this ring. Heme is an iron (in ferrous state) porphyrin ring.
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