Photosynthesis, generally, is the synthesis of sugar from light, carbon dioxide and water, with oxygen as a by-product. It is arguably the most important biochemical pathway known; nearly all life depends on it. It is an extremely complex process, comprised of many coordinated biochemical reactions. It occurs in higher plants, algae, some bacteria, and some protists, organisms collectively referred to as photoautotrophs. This article summarizes some of the major aspects of the process and provides links to more detailed articles explaining the numerous technical details, and implications, involved.
Photosynthesis uses the energy of light to make the sugar, glucose. A simplified general equation for photosynthesis follows.
6 CO2 + 12 H2O + light → C6H12O6 + 6 O2 + 6 H2O
Carbon Dioxide + Water + Light energy → Glucose + Oxygen + Water
Photosynthesis occurs in two stages. In the first phase light-dependent reactions or photosynthetic reactions (also called the Light reactions) capture the energy of light and use it to make high-energy molecules. During the second phase, the light-independent reactions (formerly the Dark Reactions) use the high-energy molecules to capture carbon dioxide (CO2) and make the precursors of glucose.
2006-08-19 03:56:25
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answer #1
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answered by Anonymous
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It depends on how exact you want to get.
Many sources will say
carbon dioxide + Water + light energy (in the presence of cholorphyll) will yield glucose + oxygen
then, if you want the balanced equation, many sources will write
6CO2 + 6H2O --> C6H12O6 + 6O2
HOWEVER glucose is not truly an endproduct of photosynthesis. AND the inorganic compounds from the soil are often left out.
For a 4th grade answer, the above is ok, but it you want a more accurate answer, please contionue,,,
Oversimplifications
Many misconceptions involve oversimplification of concepts, particularly at the precollege level. Such an “extreme of simplification” in plant teaching is not new.6 The following summary equation for plant photosynthesis is an oversimplification that contains several misconceptions:
sunlight, chlorophyll
6 CO2 + 6 H2O -----------------------------> 6 O2 + C6H12O6 (glucose)
The explanation of photosynthesis is a particularly good example. Chlorophyll alone is insufficient for plant photosynthesis. Many other enzymes and organic compounds are required. “Chloroplasts” is a better requirement.
Glucose is not the major photosynthetic product. There is virtually no free glucose produced in photosynthesis.7 The most common product is starch or sucrose, and students often test leaves for starch. Starch is approximated as (C6H10O5)n, where n is in the thousands.8
The six water molecules consumed per glucose molecule generated underestimates the water required. Much larger amounts are transpired to keep the stomata open. Without open stomata, photosynthesis is limited by lack of carbon dioxide. Submerged aquatic plants require large amounts of water for their aquatic environment.
Drawing a single arrow wrongly implies that photosynthesis occurs in one step. Many small arrows should be used.
Some of the energy captured in the light reactions of photosynthesis is used in the chloroplast to synthesize fatty acids and proteins.7 Thus, there are other types of “photosynthesis.”
The biology teaching literature contains much information on photosynthesis, yet it often has minimal discussion of mineral nutrient uptake by plants.9 To counter this problem, “mineral nutrients” should be added to the equation. Most essential mineral nutrients play a role in photosynthesis.
Taking these misconceptions into account gives the following summary equation for photosynthetic carbon fixation in plants:
chloroplasts, light, mineral nutrients
H2O + CO2-->-->-->-->-->-->-->-->-->-->-->O2 + (C6H10O5)n [starch]
water for transpiration or an aquatic environment
2006-08-20 12:38:07
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answer #2
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answered by phd4jc 3
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6 CO2 + 12 H2O Presence of Sunlight → C6H12O6 +
6 H2O + 6 O2
Carbon Dioxide + Water + Light energy → Glucose + Oxygen + Water
Photosynthesis occurs in two stages. In the first phase light-dependent reactions or photosynthetic reactions (also called the Light reactions) capture the energy of sunlight and use it to make high-energy molecules.Second phase U could not required.
2006-08-19 20:19:26
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answer #3
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answered by linda 2
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6 CO2 + 12 H2O + light → C6H12O6 + 6 O2 + 6 H2O
Carbon Dioxide + Water + Light energy → Glucose + Oxygen + Water
2006-08-22 05:34:29
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answer #4
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answered by Vidhan A 1
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The short course is that the energy for the sun pops an electron to a higher energy level which can be used to make food
2006-08-19 04:05:31
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answer #5
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answered by Nick l 2
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Photosynthesis is achemical reaction in which plants produce food for themselves. in this reaction the sunlight is used and carbondioxide plus water is used up , chlorophyll is must for this.
2006-08-19 03:58:21
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answer #6
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answered by poonaforyou_2006 3
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6CO2+6H20+energy---->C6 H12O6+CO2
for the cellular respiration
C6H12O6+CO2---->CO2+H2O+energy
2006-08-19 05:48:38
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answer #7
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answered by kinse15 2
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6CO2 + 6H2O + Energy = C6H12O6 + ATP
2006-08-22 01:24:32
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answer #8
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answered by where's the problem??!! 2
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H2O = water.
2006-08-19 03:54:08
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answer #9
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answered by shizzlechit 5
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CO2 +H2O------------->(IN PRESENCE OF SUNLIGHT AND CHLOROPHYLL) C6H12 O6 +2H20 +2O2
2006-08-19 04:01:23
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answer #10
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answered by Dot 1
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