Question

Which of the following statements is true with regard to the light reaction of photosynthesis?

• A. In PSII the reaction center chlorophyll a has an absorption peak at 700 nm, hence is called P 700
• B. In PSI the reaction center chlorophyll has an absorption maxima at 680 nm and is called P 680
• C. The splitting of water molecules is associated with PSI
• D. Photosystems I and II are involved in Z scheme
• E. Lamellae of the grana have PSI and PS II and stroma lamellae membranes have PS II only

Answer 1

The correct option is D Photosystems I and II are involved in Z scheme

Z-scheme is a diagrammatic representation of the electron flow in cyclic phosphorylation and non-cyclic phosphorylation, showing the change in energy potential of the electrons. It involves both the photosystems PS I and II.