MDCAT Biology MCQ #550

Carotenoids and Chlorophylls coexist in the thylakoid. Which role is specific to carotenoids but not to chlorophyll a?

MDCAT Biology MCQ #550

  1. Question 1

    Q1. Carotenoids and Chlorophylls coexist in the thylakoid. Which role is specific to carotenoids but not to chlorophyll a?

    • A) The ability to absorb red and blue light
    • B) The presence of a porphyrin ring with magnesium
    • C) The role in protecting against photo-oxidation
    • D) The solubility in water and other polar solvents

    Answer: The role in protecting against photo-oxidation

    Explanation: Carotenoids are accessory pigments that protect chlorophyll from photo-oxidation; chlorophyll a is the main reaction center pigment.