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Thread: Photosynthesis

  1. #1 Photosynthesis 
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    What i really want somebody to explain to me is how plants turn water into its elements of hydrogen and oxygen. Could somebody please explain this too me in a way that is understandable. However i do need to know everything about how they do it


    Thank you


     

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  3. #2  
    Forum Isotope (In)Sanity's Avatar
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    A few links that may be of use, I'm no expert on the subject.

    http://www.emc.maricopa.edu/faculty/...BioBookPS.html

    http://photoscience.la.asu.edu/photo...ion/learn.html


     

  4. #3  
    Forum Freshman Crimson_Scribe's Avatar
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    Long answer – there are around 80 different biological functions that turn ATP into glucose, but here’s the short answer:

    6CO(2) + 6H(2)O + Light (ATP) = 6O(2) + C(6)H(12)O(6)

    so here we have six carbon dioxide molecules, six water molecules, and light energy. These are required for a reaction that gives us six oxygen molecules and one glucose molecule.

    And if you need something a bit more complicated (with kreb’s cycle and whatnot) let me know
    Theatre is the laboratory of the human soul. – Peter Brook
     

  5. #4  
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    thank you. i would like something more comlicated. e.g. how does chlorophyll split water? not into glucose but before that it has to be into oxygen and hydrogen first. how does this happen?

    Thank you
     

  6. #5  
    Him
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    Forum Sophomore Him's Avatar
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    How is a very difficult questions, (In)sanity has posted a very good link to explain the total process of photosynthesis. I will try to answer the issue regarding the water splicing.

    photosynthesis is a clever and clean way to make energy, this is achieved by electron transport. Light energy can exite water (meaning light can give an electron a higher energy). This is the basis of the whole photosynthesis (light energy converting to chemical energy). The electron with the higher energy can know leave the water molecule (because it has the energy to escape) and will be bond to another molecule in the electron transport system (see links of (In)sanity).

    If we have two H2O who loose in total four electrons: 4H+ and 4 electrons- are created the two highly reactive oxygens form oxygengas which is released becauwe of toxicity. The H+ is used later on to make ATP.

    I hope this somewhat helps you
    he who forgets...will be destined to remember (Nothing Man - Pearl Jam)
     

  7. #6  
    Forum Freshman grazzhoppa's Avatar
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    "Him" explained it well.

    A little more detailed, starting with a little bit of background info:

    At the "beginning" of photosynthesis there are a bunch of chlorophyll molecules that recieve light photons and they transfer the light energy to 2 'reaction center' chlorophyll molecules. At the reaction center, the light energy excites electrons on the chlorophyll molecules and those electrons get sent on their way to assist in making the ingredients for the carbon fixation process (where the glucose gets made).

    To answer your question specifically:

    Since the reaction center chlorophyll molecules are postively charged after they lose an electron they have an "affinity" (electronegitivity) for electrons. The electronegitivity of those chlorophyll molecules is what strips the electrons from the hydrogen atoms in the water molecule and breaks the bond between the hydrogen and oxygen of water.

    If you want even more detailed, you'd have to learn how to calculate the electronegativity of molecules which is a pain in the ass if I remember from when I was taught it. Especially when chlorophyll looks like this:

     

  8. #7  
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    photosynthesis is the process where the energy released from light is used to break the strong hydrogen bond in water molecule. Hydrogen combines with carbondioxide from air to form glucose, and oxygen is released as a waste product!
    this is the equation of photosynthesis:
    water+ carbondioxide ......... glucose + oxygen

    it is simplified and very limited because it shows the overall process of photosynthesis . Actually, photosynthesis consists of series of complex reactions

    there are two stages of photosynthesis
    light -dependent stage ( which involves cyclic and non-cyclic photophysphorylation)
    light-independent stage( it is also called the celvin cycle)

    do you want the details of this two stages???
     

  9. #8  
    Forum Ph.D. Heinsbergrelatz's Avatar
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    thank you. i would like something more comlicated. e.g. how does chlorophyll split water? not into glucose but before that it has to be into oxygen and hydrogen first. how does this happen?

    Thank you
    i think the links provided by In(Sanity),(especially the first one), seems complicated enough, at least for me.
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  10. #9  
    Moderator Moderator TheBiologista's Avatar
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    This thread is 5 years old. Fatooma, you're new here, but please don't do this. It's generally frowned upon to bring threads back from the dead.
     

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