Which specific pigment molecule acts as the primary reaction center in both Photosystem I and Photosystem II?
Show answer and explanation
Correct answer: Chlorophyll a
Chlorophyll a is the primary pigment that participates directly in the light reactions by transferring electrons to the primary electron acceptor. Other pigments like chlorophyll b and carotenoids act as accessory pigments, funneling energy toward the chlorophyll a reaction center.
Keep practicing
More Photosynthesis questions
- During the light-dependent reactions, what is the primary source of electrons that replace those lost by Photosystem II?
- In which part of the chloroplast does the Calvin Cycle (light-independent reactions) take place?
- What is the primary function of the enzyme RuBisCO in the Calvin Cycle?
- Which of the following are the two main products of the light-dependent reactions that are required to power the Calvin Cycle?
- What is the primary byproduct of photosynthesis that is released into the atmosphere through the stomata?
- At what wavelength of light does the reaction center of Photosystem I (PSI) show its maximum absorption peak?