Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    My text books tell me it is in the stroma but the answer to the exam question said thylakoid membranes...
    Offline

    3
    ReputationRep:
    I wOuldsay the thylakoid membrane that's where the LDR takes place I think?
    Offline

    18
    ReputationRep:
    (Original post by Geckogirl64)
    My text books tell me it is in the stroma but the answer to the exam question said thylakoid membranes...
    are you sure that's what it says in the textbook? Shouldn't it say reduced NADP is made in non-cyclic phosphorylation, which occurs in the thylakoid membrane? Does it mean that reduced NAD is oxidised to release hydrogen atoms in the stroma for the light independent reaction?
    Offline

    9
    ReputationRep:
    The NADP is reduced at the thylakoid membrane during light-dependent stage whereas the reduced NADP releases back the hydrogen atoms during light-independent stage in the stroma when GP is converted into TP.
    Offline

    2
    ReputationRep:
    yep, having read this... if i sat a-level biology again i'd get a U for sure...


    the worst bit? i'm on course for a 2.1 in zoology :moon:
    Offline

    0
    ReputationRep:
    (Original post by Geckogirl64)
    My text books tell me it is in the stroma but the answer to the exam question said thylakoid membranes...
    Firstly, for reduction to occur, electrons must be gained. Alternatively, hydrogen can be gained (not just a hydrogen ion, it would need to be a hydrogen ion and electron.)

    So, the NADP is reduced by the electrons from the chlorophyll in the light dependant stage and then a H+ ion from the water that breaks down from photolysis also goes towards this forming NADPH (reduced NADP). All this is in the thylakoid membrane.


    (p.s. HATE PHOTOSYNTHESIS SOOOO MUCH)
    Offline

    0
    ReputationRep:
    to summarise what everyone has been saying over and over again: its in the thylakoid membrane.
    wow.. u shud really sue the textbook writers
    Offline

    3
    ReputationRep:
    This thread takes me back to my teacher asking the class to cross out like 10 things in our A Level Biology textbooks
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Did TEF Bronze Award affect your UCAS choices?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.