MDCAT Biology MCQ #461

A researcher analyzes the porphyrin ring of a chlorophyll a molecule. Which central metallic atom is essential for its light-absorbing structure?

MDCAT Biology MCQ #461

  1. Question 1

    Q1. A researcher analyzes the porphyrin ring of a chlorophyll a molecule. Which central metallic atom is essential for its light-absorbing structure?

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

    Answer: Magnesium

    Explanation: Magnesium occupies the center of the porphyrin ring; iron is the central atom in hemoglobin, not chlorophyll.