MDCAT Biology MCQ #469

Comparing the molecular structures of chlorophyll a and b, which functional group is specifically attached to the porphyrin ring of chlorophyll b?

MDCAT Biology MCQ #469

  1. Question 1

    Q1. Comparing the molecular structures of chlorophyll a and b, which functional group is specifically attached to the porphyrin ring of chlorophyll b?

    • A) Methyl group (-CH3)
    • B) Aldehyde group (-CHO)
    • C) Hydroxyl group (-OH)
    • D) Carboxyl group (-COOH)

    Answer: Aldehyde group (-CHO)

    Explanation: Chlorophyll b is distinguished by an aldehyde (-CHO) group; chlorophyll a contains a methyl (-CH3) group at that position.