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    hey tsr just wanted the answers to two homework questions....i dont understand them at all! if i could have the answers it would put my mind to rest....been trying for ages!

    1) describe the role of reduced nad when respiration takes place in aerobic condition (3 marks)

    2) explain why the yield of ATP from the respiration of one molecule of glucose when oxygen is present is more than the yield of ATP from the respiration of one molecule of glucose under anaerobic conditions (5 marks)


    Thanks , will give + rep tomorrow to whoever helps
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    reduced NAD provides 2H+ and 2e- for the electron transport chain allowing chemiosmosis and so atp synthesis
    just thinking about the other one a bit
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    (Original post by LeChat)
    reduced NAD provides 2H+ and 2e- for the electron transport chain allowing chemiosmosis and so atp synthesis
    just thinking about the other one a bit
    Wow, when I did A2 biology last year, I never came across the term 'chemiosmosis' :confused:
    What is it?
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    oh, if you have no oxygen then link and krebs both stop as the ETC cannot function without oxygen (it's oxidative phosphorylation), and the ETC is where most of the atp is formed
    therefore anaerobic respiration occurs forming lactant/lactic acid from pyruvate, the end product of glycolysis, which in itslef produces no atp but it reoxidises the reduced NAD to NAD, so glycolysis can continue producing a net 2 atp molecules per glucose molecule
    hope it helps
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    (Original post by thecdon)
    hey tsr just wanted the answers to two homework questions....i dont understand them at all! if i could have the answers it would put my mind to rest....been trying for ages!

    1) describe the role of reduced nad when respiration takes place in aerobic condition (3 marks)

    2) explain why the yeild of ATP from the respiration of one molecule of glucose when oxygen is present is more than the yield of ATP from the respiration of one molecule of glucose under aerobic conditions (5 marks)

    Thanks , will give + rep tomorrow to whoever helps
    Eh?
    Oxygen present? Aerobic conditions? Same thing no?
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    (Original post by Hippysnake)
    Eh?
    Oxygen present? Aerobic conditions? Same thing no?
    apologies! ANaerobic conditions!
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    (Original post by IheartASOS)
    Wow, when I did A2 biology last year, I never came across the term 'chemiosmosis' :confused:
    What is it?
    um i think its when the H+ ions move through the stalked particle: its the movement of ions down a concentration gradient through a partially permeable membrane blah blah...?
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    (Original post by LeChat)
    um i think its when the H+ ions move through the stalked particle: its the movement of ions down a concentration gradient through a partially permeable membrane blah blah...?
    like osmosis but with chemicals instead
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    (Original post by thecdon)
    apologies! ANaerobic conditions!
    In which case, the only ATP made under anaerobic conditions is the two from glycolysis, as the NADH can't progress to the electron transport chain due to lack of O2. Hence, the vast reserves of potential energy are not harvested and instead, NADH reduced Pyruvate into one of Lactate/Ethanol+CO2.
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    (Original post by Hippysnake)
    In which case, the only ATP made under anaerobic conditions is the two from glycolysis, as the NADH can't progress to the electron transport chain due to lack of O2. Hence, the vast reserves of potential energy are not harvested and instead, NADH reduced Pyruvate into one of Lactate/Ethanol+CO2.
    thanks, but this won't get 5 marks will it? i have no idea how its possible to get 5 marks for this q.
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    (Original post by LeChat)
    um i think its when the H+ ions move through the stalked particle: its the movement of ions down a concentration gradient through a partially permeable membrane blah blah...?
    Oh of course, just realised the name is pretty self-explanatory! Silly me :rolleyes:
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    Hi there, i could have posted all the answers but... i gotta rush might miss my bus sorry, here i recommend you this thread for all your F214 needs .
    http://www.thestudentroom.co.uk/show...8#post23409488 <--- clicky
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    (Original post by ibysaiyan)
    Hi there, i could have posted all the answers but... i gotta rush might miss my bus sorry, here i recommend you this thread for all your F214 needs .
    http://www.thestudentroom.co.uk/show...8#post23409488 <--- clicky
    im doing edexcel¬
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    (Original post by thecdon)
    im doing edexcel¬
    Oh! gotcha ,sorry lol.
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    (Original post by thecdon)
    hey tsr just wanted the answers to two homework questions....i dont understand them at all! if i could have the answers it would put my mind to rest....been trying for ages!

    1) describe the role of reduced nad when respiration takes place in aerobic condition (3 marks)

    2) explain why the yield of ATP from the respiration of one molecule of glucose when oxygen is present is more than the yield of ATP from the respiration of one molecule of glucose under anaerobic conditions (5 marks)


    Thanks , will give + rep tomorrow to whoever helps

    Absolute jewboy!!!!!!!!!!!
 
 
 
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