Notices
Results 1 to 8 of 8

Thread: Energy

  1. #1 Energy 
    New Member
    Join Date
    Oct 2006
    Posts
    4
    what is the relationship between chlorophyll and the color of the plants?

    Also, how well would a plant grow under pure yellow light?..

    How are ATP(Adenosine Triphosphate) and glucose similar, with respect to energy, and how are they different?

    Thanks


    Reply With Quote  
     

  2.  
     

  3. #2  
    Forum Sophomore
    Join Date
    Sep 2006
    Location
    Edmonton, AB, Canada
    Posts
    120
    Chlorophyll is green. THerefore plants that have lots of chlorophyll will be green! There are other pigments (carotenoids for example) that are different colors, and plants usually have a combination of these molecules.

    A plant grown exclusively under yellow light ... i believe ... would turn a darkish blue color (assuming it had the ability to produce pigments of that nature)

    I'm not 100% sure on that last point there.


    It is not so much that I have confidence in scientists being right, but that I have so much in nonscientists being wrong. --- Isaac Asimov
    Reply With Quote  
     

  4. #3  
    Forum Sophomore
    Join Date
    Sep 2006
    Location
    Edmonton, AB, Canada
    Posts
    120
    oh sorry, didn't see the last question there.

    Both ATP and glucose are used for energy in the cell. Difference is ... ATP releases energy when it loses a phosphate group. Where as when glucose is metabolised it produces molecules that can be reduced (NADH and FADH) and result in a proton gradient. This proton gradient then makes ATP with the enzyme ATPase.

    It should also be noted that some ATP is directly released in the metabolism of glucose as well (in the kreb's cycle)
    It is not so much that I have confidence in scientists being right, but that I have so much in nonscientists being wrong. --- Isaac Asimov
    Reply With Quote  
     

  5. #4  
    Forum Freshman electricant's Avatar
    Join Date
    Sep 2006
    Posts
    89
    Quote Originally Posted by sigmafactor
    Chlorophyll is green. THerefore plants that have lots of chlorophyll will be green! There are other pigments (carotenoids for example) that are different colors, and plants usually have a combination of these molecules.

    A plant grown exclusively under yellow light ... i believe ... would turn a darkish blue color (assuming it had the ability to produce pigments of that nature)
    Take a look at the wikipedia entry for chlorophyll, therer is a figure showing the absorbance spectrum of chlorophyll over the visible range. Chlorophyll gives a plant its green colour because it absorbs visible light strongly in the red and blue wavelengths. If you take the white light from the sun and take out the red and blue frequencies in this way then you are left with green.

    Yellow light 565-590 nm is absorbed very poorly by chlorophyll (see the same wikipedia figure). Yellow light alone will not support photosynthesis so the plant will slowly die (in effect from 'starvation' because it can no longer synthesise its own carbohydrates from CO2 and H2O).
    Reply With Quote  
     

  6. #5  
    Forum Masters Degree invert_nexus's Avatar
    Join Date
    Apr 2005
    Posts
    639
    Why are people so eager to do other people's homework?
    Shame on you.
    Reply With Quote  
     

  7. #6  
    Moderator Moderator AlexP's Avatar
    Join Date
    Jul 2006
    Location
    NY
    Posts
    1,838
    Quote Originally Posted by invert_nexus
    Why are people so eager to do other people's homework?
    Shame on you.
    Go invert_nexus! I agree.
    Reply With Quote  
     

  8. #7  
    New Member
    Join Date
    Oct 2006
    Posts
    4
    Invert, it was practice test.... :? dont' get excited there :/..

    Well, thanks, i've heard that plant reflexes the color green, that's why we see green color in the plants
    Reply With Quote  
     

  9. #8  
    Forum Masters Degree invert_nexus's Avatar
    Join Date
    Apr 2005
    Posts
    639
    Get some good practice out of it then?

    Well, thanks, i've heard that plant reflexes the color green, that's why we see green color in the plants
    Yup.
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •