MDCAT Biology MCQ #491

Chlorophyll a and b differ by only one functional group attached to the porphyrin ring. What group is unique to chlorophyll b?

MDCAT Biology MCQ #491

  1. Question 1

    Q1. Chlorophyll a and b differ by only one functional group attached to the porphyrin ring. What group is unique to chlorophyll b?

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

    Answer: Aldehyde group (-CHO)

    Explanation: Chlorophyll b has an aldehyde (-CHO) group; chlorophyll a has a methyl (-CH3) group at the same position.