Botany - Photosynthesis in Higher Plants Question with Solution | TestHub

When only PS I is functional, the electron is circulated within the photosystem and the phosphorylation occurs due to cyclic flow of electrons. A possible location where this could be happening is in the stroma lamellae. While the membrane or lamellae of the grana have both PS I and PS II. The stroma lamellae membranes lack PS II as well as NADP reductase enzyme. The excited electron does not pass on to NADP⁺but is cycled back to the PS I complex through the electron transport chain