A level bio photosynthesis (edexcel ?)

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Leah.J
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#1
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#1
Can some explain what electron transport chains are please ?

I'm doing unit 4 Bio now and my book says that in the light dependant stage of photosynthesis , a photon of light excites an electron and then the electron passes through an electron transport chain which releases energy .
I don't get it , what are electron transport chains ?
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Reality Check
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(Original post by Leah.J)
Can some explain what electron transport chains are please ?

I'm doing unit 4 Bio now and my book says that in the light dependant stage of photosynthesis , a photon of light excites an electron and then the electron passes through an electron transport chain which releases energy .
I don't get it , what are electron transport chains ?
Electron transport chains are series of proteins which facilitate redox reactions in electron carriers. This is how energy is 'harvested' from substrates during respiration. Are you doing Chemistry? An understanding of redox is fairly important in understanding how they work.
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Kinyonga
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In addition to the above I'd recommend this site if you're still confused about the ETC:
http://www.khanacademy.org/science/b...esis-in-plants
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Reality Check
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(Original post by Kinyonga)
In addition to the above I'd recommend this site if you're still confused about the ETC:
http://www.khanacademy.org/science/b...esis-in-plants
Yes, that's a good easy introduction. PS: I want your tuxedo cat - beautiful.
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Kinyonga
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(Original post by Reality Check)
PS: I want your tuxedo cat - beautiful.
Well you can't have her. She's mine.
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