BIOL 1050 Lecture Notes - Lecture 17: Plastoquinone, Photosystem, Electrochemical Gradient

• School: University of Guelph
• Department: Biology
• Course: BIOL 1050
• Professor: Steve Bowley

Document Summary

Instruments designed to record the rate of photosynthesis are calibrated to measure only visible light, but plants can also use the ultraviolet spectrum. Photosynthesis and respiration concurrent processes (occur at same time, sometimes even in same cell) Respiration always occurs in root system, whereas the rest is primarily in rest of plant. Diffe(cid:396) (cid:271)(cid:455) a phosphate g(cid:396)oup at (cid:1006)"c o(cid:374) the 5-carbon sugar. Nad used in catabolic reactions: breaking down molecules to release energy. Nadp used in anabolic reactions: building larger molecules. Photons go into psii, pair of chlorophyll a molecules are held at a partic. point, excite the e- there, captured by plastoquinone to make it plastoquinol. This makes the manganese complex short of 4e-, split water molecules to replace those e- Plastoquinol transfers e- to cytochrome complex, which uses that energy to make a proton gradient into the lumen space. The protons move across the [] gradient through atp synthase to generate atp.