Biology 1002B Chapter Notes - Chapter 1: Chlamydomonas Reinhardtii, Electromagnetic Spectrum, Simple Eye In Invertebrates
4 Apr 2016
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Chlamydomonas reinhardtii: 1 chloroplast to perform photosynthesis, eyespot to gather info about location and intensity of light source: to optimize light harvesting. Conversion of hydrogen into helium producing energy. Energy as electromagnetic radiation: look at wavelengths. Light: the portion of the electromagnetic spectrum that humans can detect with their eyes: 400nm to 700nm, other definitions may include visible, ultraviolet and infrared light. 3 possibilities: light reflected, light transmitted through, light absorbed: aka usage of energy. During absorption: energy of photon is transferred to an electron in molecule: energy of photon must match energy of electron that moves from ground state to excited. Pigments: molecules that are efficient in absorbing photons: chlorophyll a, indigo, phycoerythobilin, pigments have commonly carbons bonded to each other with alternating double and single bonds: conjugated system causes delocalization of electrons. Different pigments absorb different colours, colour that not absorbed is reflected.
