CHEM 2001 Chapter : Problem Set 20KEY
Document Summary
The light is necessary to make the chlorophyll green, so the pigment can transmit electrons. The light is used to generate high-energy electrons with great reducing potential. The light provides heat energy for the chloroplasts. The light is absorbed by oxygen, which is converted into water. In the overall stoichiometry of the light reactions, eight photons of light generate: four nadph. four nadh. three atp. The thylakoids of chloroplasts are analogous to membrane cristae in structure and function: compare and contrast the photosynthetic and respiratory electron transfer chains. The purpose of both electron transfer chains is to generate a proton gradient for atp synthesis. The photosynthetic electron transfer chain will also yield reducing power in the form of nadph; reducing power is needed to fuel the respiratory electron transfer chain. The photosynthetic electron transfer chain has psii, cytochrome b6f, psi. The respiratory electron transfer chain has complexes i iv.
