MDCAT Biology MCQ #261

During the chemical analysis of a chlorophyll molecule, a specific metallic ion is found coordinated at the center of the porphyrin ring. Identify this ion.

MDCAT Biology MCQ #261

  1. Question 1

    Q1. During the chemical analysis of a chlorophyll molecule, a specific metallic ion is found coordinated at the center of the porphyrin ring. Identify this ion.

    • A) Iron
    • B) Copper
    • C) Magnesium
    • D) Manganese

    Answer: Magnesium

    Explanation: Magnesium is the central atom in chlorophyll; Iron is the central atom in the heme group of hemoglobin, which is a common distractor.