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    Apparently 'the light dependent stage of photosynthesis takes place on the thylakoid membranes of the chloroplasts', but then my book says that 'PS1 occurs mainly on the intergranal lamellae and PS11 occurs almost exclusively on the granal lamellae'. Is lamellae and thylakoid the same thing or something? :confused: But then I thought the thylakoid membranes were lamellae that were stacked in a grana?

    Or does it mean that most of the photosystems are on the thylakoid membranes? Or that most of the reaction occurs on the thylakoid membranes?
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    Lamella is a broad term used to describe thin structures, such as thylakoid membranes.
    It probably uses the term 'intergranal lamellae' because its referring to the chlorPHYLL that is contained within the thylakoid membranes.
    So in order of what contains what-
    Chloroplast>stacks of granum> stacked thylakoid membranes (make up the granum)>chlorphyll
    Chlorophyll are the structure within the chloroplast that actually absorb the light energy, depending on what board you're with, they may require you to be more/less specific.
    So the light dependent stage more or less relies completely on the chlorophyll.
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    (Original post by Mikenchi)
    Lamella is a broad term used to describe thin structures, such as thylakoid membranes.
    It probably uses the term 'intergranal lamellae' because its referring to the chlorPHYLL that is contained within the thylakoid membranes.
    So in order of what contains what-
    Chloroplast>stacks of granum> stacked thylakoid membranes (make up the granum)>chlorphyll
    Chlorophyll are the structure within the chloroplast that actually absorb the light energy, depending on what board you're with, they may require you to be more/less specific.
    So the light dependent stage more or less relies completely on the chlorophyll.
    Sorry I got it wrong in the OP (edited it now), they said 'PS1 occurs mainly on the intergranal lamellae and PS11 occurs almost exclusively on the granal lamellae'. Isn't the intergranal lamellae is the lamellae that looks like a bridge between grana? So why did they say that the light dependant happens on the thylakoid membranes? Isn't the thylakoid membrane the lamellae that are stacked up into grana?
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    anyone?
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    Our exam board taught "Intergranal lamallae" as "intergranal thylakoid". So they'd be the same thing. Just replace "lamallae" with "thylakoid", they're practically interchangeable.
 
 
 
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