MDCAT Biology MCQ #319

A researcher observes a pigment molecule with a carbonyl group (-CHO) instead of a methyl group. This pigment is:

MDCAT Biology MCQ #319

  1. Question 1

    Q1. A researcher observes a pigment molecule with a carbonyl group (-CHO) instead of a methyl group. This pigment is:

    • A) A methyl group (-CH3)
    • B) An aldehyde group (-CHO)
    • C) A magnesium atom
    • D) A phytol tail

    Answer: An aldehyde group (-CHO)

    Explanation: Chlorophyll b has an aldehyde group. Chlorophyll a is tempting because it is the main pigment but has a methyl group.