BIOL 1000 Chapter Notes - Chapter 1-13: Pyruvic Acid, Light-Independent Reactions, Malic Acid
15 Dec 2016
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Electromagnetic radiation: energy converted by the sun, travelling in the form of a wave at a speed of light and reaches earth. Distinguish different types of electromagnetic radiation by their wave length, distance between two successive peaks. Wavelength of light: distance between two successive peaks of electromagnetic radiation. Pigment: molecule that can abosrb photons of light very efficiently, different pigments absorb different wavelengths of light becayuse they differe in the number of excited states available. Photoreceptor: basic light sensing system (most common is rhodopsin) Absorption spectrum: curve representing the amount of light absorbed at each wavelength. Dna: molecule taht is the gentic material of all organisms. Rhodopsin: consists of proteins called opsin that binds a single pigment molecule called retianl. Absorption of a photon of light causes the retinal pigment molecule to change shape. This change triggers alterations to the opsin protein, triggers downstream events including alterations in intracellular ion concentration and electrical signals.
