BISC 101 Lecture Notes - Lecture 9: Photosynthetic Reaction Centre, Photorespiration, Stoma

• School: Simon Fraser University
• Department: Biological Sciences
• Course: BISC 101
• Professor: Tony Williams

Document Summary

Chloroplasts: site of photosynthesis, double membrane, contains fluid called stroma. Stroma holds thylakoids(stacked called grana): contain pigments called chlorophyll (absorb visible light-energy) Chlorophyll: appear green because absorbs violet-blue and red wavelength light while reflecting green light. How does chlorophyll capture light energy: photon of light strikes chlorophyll=energy is transferred to an electron, electron is excited . Electron drops back down to lower energy level; heat and fluorescence are emitted. Energy in electron is transferred to nearby pigment. Energy from electron->many chlorophyll molecules of an antenna complex -> reaction center->electron acceptor. Cell wall: provides structural support, occurs outside plasma membrane, consist of rods or fibers of cellulose in a matrix of polysaccharides and proteins. Primary cell wall: young plants thin, flexible. Carbon dioxide (6co2) + water (6h20) + energy ----> glucose + oxygen (6o2) Stomata: main route for evaporative loss of water via transpiration.