Biology 1002B Lecture Notes - Endoplasmic Reticulum, Carbon Fixation, Pyrenoid
16 Oct 2013
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Document Summary
Chlamydomonas: sexually active, light-harvesting, carbon-reducing hydrogen- belching planimal. Nucleus just one, similar to animal cells. Basal body at the base of flagellum, where microtubules develop to produce flagellum. Pyrenoid here carbon fixation takes place, in chloroplasts. Eyespot rich in carotenoid pigment, found in chloroplast, nothing to do with photosynthesis, enables cell to orientate itself towards light needed for photosynthesis. Carbon fixation: reduction of inorganic carbon to organic compounds by living organisms. More than one entity that comes together. Ex: protein complex where several proteins come together. Chlamy is much larger (more complex) than e. coli. Same species with different levels of multicellularity. Volvox: very multicellular green algae, chlamy is unicellular green algae. Evolution of multicellularity goes along with evolution of death, if you are part of multicellular organism you have to be willing to die, not when unicellular. Used for phototaxis (movement towards or away from light) Chlamy wants to move towards light to get more for photosynthesis.
