LIFESCI 2 Lecture Notes - Lecture 6: Light-Independent Reactions, Photophosphorylation, Chemotroph

• School: UCLA
• Department: Life Sciences
• Course: LIFESCI 2
• Professor: Friscia Anthony/ Esdin

Document Summary

Autotroph make organic molecules from inorganic molecules (co2, water). Photoautotroph use light energy to make energy. Heterotroph need source of organic molecule e. g. all animals, fungi, protists. Photosynthesis happens in chloroplasts plants + algae. Double membrane outer, intermembane space, inner membrane. Chlorophyll pigment that absorbs light of a particular wavelength. Absorb red + blue and transmits/reflects green light. Light-dependent reaction light energy chemical energy (atp, nadph) Photosystems i and ii absorb photons and boost electrons to a higher energy level. Reaction center split water and boost electrons (chlorophyll located here) Use high energy electrons to convert co2 to organic molecules carbon fixation. Electrons in nadph + atp to fix carbon. Calvin cycle makes g3p (3c: carbon fixation co2 + rubp (5c) 6c 2 + 3c. Rubisco : reduction 3c phosphorylated using atp and nadph to make g3p. G3p can be converted into glucose/other organic molecules: regeneration g3p built back up to 5c rubp using atp.