Chapter 10 - Chapter 10 absorption spectrum: The range of a...

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Chapter 10 absorption spectrum : The range of a pigment’s ability to absorb various wavelengths of light; also a graph of such a range. action spectrum : A graph that profiles the relative effectiveness of different wavelengths of radiation in driving a particular process. adenosine triphosphate (ATP) : An adenine-containing nucleoside triphosphate that releases free energy when its phosphate bonds are hydrolyzed. This energy is used to drive endergonic reactions in cells. autotroph : An organism that obtains organic food molecules without eating other organisms or substances derived from other organisms. Autotrophs use energy from the sun or from the oxidation of inorganic substances to make organic molecules from inorganic ones. bundle-sheath cell : in C4 plants, a type of photosynthetic cell arranged into tightly packed sheaths around the veins of A leaf. C3 plant : A plant that uses the Calvin cycle for the initial steps that incorporate CO2 into organic material, forming a three-carbon compound as the first stable intermediate. C4 plant : A plant in which the Calvin cycle is preceded by reactions that incorporate CO2 into a four-carbon compound, the end product of which supplies CO2 for the Calvin cycle. Calvin cycle/reactions : The second of two major stages in photosynthesis (following the light reactions), involving fixation of atmospheric CO2 and reduction of the fixed carbon into carbohydrate. CAM plant : A plant that uses crassulacean acid metabolism, an adaptation for photosynthesis in arid conditions. In this process, carbon dioxide entering open stomata during the night is converted to organic acids, which release CO2 for the Calvin cycle during the day, when stomata are closed. carbon fixation : The initial incorporation of carbon from CO2 into an organic compound by an autotrophic organism (a plant, another photosynthetic organism, or a chemoautotrophic prokaryote). carotenoid : An accessory pigment, either yellow or orange, in the chloroplasts of plants and in some prokaryotes. By absorbing wavelengths of light that chlorophyll cannot, carotenoids broaden the spectrum of colors that can drive photosynthesis. chlorophyll
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Chapter 10 - Chapter 10 absorption spectrum: The range of a...

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