Biology Forum › Cell Biology › photosynthesis
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November 16, 2005 at 3:33 am #2538
castinpetal
Participantwhy do plants depend on detectable light instead of other wavelengths of radiation for photosynthesis? 🙄
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November 16, 2005 at 1:08 pm #32877
chicoguardian
Participantto get the energy they need, when plants are in seeds, they feed off of the oil within the seed, when they are out of the seed, they need more than one way to gain energy like photosynthesis
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November 16, 2005 at 7:17 pm #32901
MrMistery
ParticipantActually it’s about the chemical properties of the chlorophile molecule. Because other pigments can use other types of light too. For example, bacteriochlorophil can use infrared light…
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November 17, 2005 at 1:12 am #32936
castinpetal
Participantoh yeah!!!!! that’s so much help! thanks!
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November 17, 2005 at 11:52 pm #33007
mmiaosmiling
Participantplants like to absorb red and purple lights relatively but dislike green so they are green…
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November 18, 2005 at 9:13 am #33023
blackmangoes
ParticipantI hate plants, but I remember that there is something called ChI moleculde in something called reaction center inside the chlorophyll that only absorb wavelength of 690nm, and pass the electron to a electron transport chain to generate ATP.
Why 680? it has to do with electron excited to different orbits and energy difference between two oribts is exactly given by 680nv x h
I hope I confuse you more! hehe
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November 18, 2005 at 1:06 pm #33042
mith
ParticipantWe’ll probably need a biophysicist to figure it out, probably this has to do with the mount of energy needed to photolyse water or maybe other efficiency issues
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November 18, 2005 at 7:14 pm #33056
MrMistery
Participantactually, what blackmangoes is referring to is the chlorophil a molecule in the center of each photosystem. for photosystem I it is 700nm(that’s why the molecule is named P700) and for photosystem II it is 680nm
I have no idea why they are like this though, probably some physics stuff…
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