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What Role Does Chlorophyll Play in Photosynthesis?
Chlorophylla-a is the primary for in plants. Its structure is shown at left. It has the composition C55H72O5N4Mg. It exhibits a grass-green visual color and absorption peaks at 430nm and 662nm. It occurs in all photosynthetic organisms except photosynthetic bacteria.
Different photosynthetic organisms use differentcombinations of pigments, which have differentcolors because they absorb and reflect differentfrequencies of light.
Plants and greenalgae (plants are really advanced green algae)contain chlorophyll a (which is teal-green),chlorophyll b (which is yellow-green), andbeta-carotene (which is yellow), thus giving thema green color. Brown algae and their unicellularrelatives (e.g. diatoms) have chlorophylla,chlorophyll c, and lipid pigments calledfucoxanthins,which together give them agolden-brown color. Red algae possess chlorophylla and lipid-based pigments called phycobilins,which give them the brilliant red(or deep blue)color. These different combinations of pigmentsare more or less efficient at collecting light atcertain frequencies and at certain levels of lightintensity (too much will damage the pigment).Thus, they parcel out the Sun's energy to make themost use of it and to not compete with otherphotosynthetic organisms.
What is the role of the green pigment chlorophyll in photosynthesis
The purpose of photosynthesis is to convert theenergy in photons (the infinitesimally smallpackets of energy that make up light) into thechemical bonds of sugar molecules.
Plants(and animals that eat plants) can then store theenergy and get it back out when they need it bybreaking those chemical bonds. The tricky part ofphotosynthesis is that it takes a very preciseamount of energy to form a particular chemicalbond. Furthermore, the photons from differentcolors of light contain different amounts ofenergy.
You probably know the colors ofthe spectrum (Red, Orange, Yellow, Green, Blue,Indigo, Violet); well, those colors are inascending order of energy -- a photon of bluelight has more energy than a photon of red light(this is true because of Planck's Law, which aphysicist could explain better than I).
Aparticular pigment molecule (like chlorophyll) isspecialized for absorbing a particular color oflight and converting the light energy into theappropriate amount of chemical energy for making achemical bond (actually there are many othermolecules that help the pigment perform thisenergy conversion, but only the pigment itself canabsorb the light). Chlorophyll just absorbs blueand red light; it hardly absorbs any green lightat all, so the green gets reflected back to oureyes, which is why leaves appear green. Otherpigments that plants have in their leaves absorblight of different colors, so they reflect red,orange, yellow, or blue light and appear to bethose colors to our eyes. Because the white lightcoming from the sun is actually made up of photonsof all the different colors, it is veryadvantageous to the plant to have many pigmentsthat can absorb such a wide range of the availablecolors of light.
When sunlight falls on leaves, chlorophyll―a green-colored pigment that occurs in photosynthetic plants―captures the energy in it, and stores it for further use.
What Role Does Chlorophyll Play in Photosynthesis? | …
The name Chlorella is from the Latin and means 'leaf' (green) and 'small', it refers to the unusually high content of Chlorophyll, which gives chlorella its characteristic deep emerald-green color.
Some plants and plantlike organisms have developed other pigments to compensate for low light or poor use of light. Cyanobacteria and red algae have phycocyanin and allophycocyanin as accessory pigments to absorbe orange light. They also have a red pigment called phycoerythrin that absorbs green light and extends the range of photosynthesis. The red pigment is found in vegetables. Some red algae are in fact nearly black, so that increases their photosynthetic efficiency. Brown algae have the pigment fucoxanthin in addition to chlorophyll to widen their absorption range. These red and brown algae grow to depths around 270 meters where the light is less than 1% of surface light.
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Health Benefits of Chlorophyll-Rich Superfoods
Chlorophyll absorbs light in the red and blue-violet portions of the visible spectrum; the green portion is not absorbed and, reflected, gives chlorophyll its characteristic color.
Why is the chlorophyll in plants green ..
Because Chlorophyll has a chemical structure similar to Hemoglobin (the red pigment of blood), several scientists have suggested the use of Chlorophyll as a medical therapy for anemia.
Why is the chlorophyll in plants green or even red, ..
in plants is dependent upon capturing light energy in the pigment , and in particular chlorophyll a. This chlorophyll resides mostly in the and gives leaves their green color. The range of light absorption in leaves is extended by some such as the , but does not cover the entire visible range - that would make the leaves black!
Chlorophyll pigment is always green.
6CO + 6H O ® C H O + 12O (in the presence of light energy and chlorophyll) Aim- The aim of the experiment is to determine what effect light intensity has upon the rate of photosynthesis of Canadian Pondweed (Elodea)....
The green pigment chlorophyll ..
The three major classes of pigments are chlorophylls (green pigments) and carotenoids (yellow or orange pigments) which are lipophilic and associated in Chl-protein complexes as well as phycobilins that are hydrophilic.
chlorophyll―a green-colored pigment that occurs in ..
This was done by separating the photosynthetic pigments (chlorophyll a, chlorophyll b, carotene and xanthophylls) from one another using paper chromatography.
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