BIOL 1000 Study Guide - Final Guide: Lipid Bilayer, Peripheral Membrane Protein, Trichromacy
Document Summary
Light can be a source of energy and information. There are two types of waves magnetic and electric. It is the visible region of the electromagnetic spectrum that humans can detect. We can only see from 400- 700nm. Energy comes in the form of photons. Extract energy (use it) interact with us effects. How does light interact with matter? reflected off the object transmitted through the object. Pigments are molecules that absorb light at different wavelengths. All pigments have a conjugated system which is an altering single/double bond. Electrons capture photons/energy which can be used to do work. A pigments colour is a result of a photon it does not absorb. All life depends on capturing energy from the sun and converting it to a form they can use. It is used in photosynthesis and cellular respiration. The products of photosynthesis become the reactants in cellular respiration. Halobacterium contain a pigment protein called bacteriarhodopsin which functions as a proton pump.