Q. Photosynthesis cannot continue for long if during light reaction, only cyclic photophosphorylation takes place. This is because
A) Only ATP is formed, $NADPH^{+} + H^{+}$ is not formed
B) Photosystem-I stops getting excited at a wavelength of light beyond 680 nm
C) There is unidirectional cyclic movement of the electrons
D) There is no evolution of oxygen
Explanation
Assimilatory power, i.e., ATP and $NADPH_{2}$ should produced during light reaction of photosynthesis.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.