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Lecture 5 - Lecture 5 John Prisestlys observation in 1772 o...

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Lecture 5 John Prisestly’s observation in 1772: o Fire is fueled by oxygen o Placed candle in closed jar with plant o After some time the candle burned out o After waiting, a candle could be burned again without introducing outside air o A mouse could survive in the jar too Properties of light o Shorter wave lengths have greater energy o Longer wave lengths are lower in energy o Pigments absorb light at specific wavelengths Wavelengths that are not absorbed are reflected Reflected light gives off color Chlorophyll a absorbs violet and red light so it appears green o T.E. Englemann Separated light using a prism across a drop of water that contain algae He introduced bacteria that were aerobic Bacteria traveled to areas with high levels of oxygen Chloroplasts and how they work o Chloroplasts are organelles found in plants that specialize in photosynthesis They are located in mesophyll cells They have 3 membranes Outer membrane, inner membrane, and thylakoid membrane The thylakoid membrane is made of a lipid bilayer o Located in the semifluid matrix called the stroma A stack of thylakoids are called grana o Pigments located inside grana
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