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    (Original post by Maham88)
    Can i just ask , there are 2ATP gained in glycolysis and 2 ATP from the kreb cycle are the rest from oxidative phosphorylation and chemiosmosis ? and do they produce 26 ATP to make a total of 30 ATP ?
    Yes this is what I've learned.

    Substrate level phoshorylation:
    2 ATP from glycolysis,
    2 ATP from Kreb's

    Then for oxidative:
    2 reduced NAD from glycolysis
    2 reduced NAD from link reaction
    6 reduced NAD from Kreb's
    TOTAL = 10 red. NAD

    Each NAD roughly makes 2.6 ATP, so 26+4 = 30.

    But I'm not sure where FAD fits into that...
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    (Original post by Molly_xox)
    Yes this is what I've learned.

    Substrate level phoshorylation:
    2 ATP from glycolysis,
    2 ATP from Kreb's

    Then for oxidative:
    2 reduced NAD from glycolysis
    2 reduced NAD from link reaction
    6 reduced NAD from Kreb's
    TOTAL = 10 red. NAD

    Each NAD roughly makes 2.6 ATP, so 26+4 = 30.

    But I'm not sure where FAD fits into that...
    Officially (according to OCR) NAD = 2.5 ATP and FAD = 1.5ATP

    10 NAD = 25 ATP
    2 FAD = 3 ATP
    4 ATP from earlier

    32 overall
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    (Original post by leerachelll)
    guys, I'm confused about the neurones and how to label the parts. Especially the difference between the dendron and axon. And also are both sides of the neurone (motor and sensory) dendrites?

    Axon carries impulses AWAY from cell body
    Dendron carries impulse TOWARDS cell body

    As motor neurones carry impulses AWAY from CNS and have their cell bodies at the end of their structure, they have a long axon and NO Dendron.
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    (Original post by leerachelll)
    guys, I'm confused about the neurones and how to label the parts. Especially the difference between the dendron and axon. And also are both sides of the neurone (motor and sensory) dendrites?
    dendrons are in the direction towards the cell body in sensory neurones and the axon is away from cell body.

    motor neurones only has a axon.

    dendrites are the things on the cell body of the motor neurone
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    (Original post by Molly_xox)
    Yes this is what I've learned.

    Substrate level phoshorylation:
    2 ATP from glycolysis,
    2 ATP from Kreb's

    Then for oxidative:
    2 reduced NAD from glycolysis
    2 reduced NAD from link reaction
    6 reduced NAD from Kreb's
    TOTAL = 10 red. NAD

    Each NAD roughly makes 2.6 ATP, so 26+4 = 30.

    But I'm not sure where FAD fits into that...
    FAD is reduced in the kreb cyle and i think that gives the 2 ATP
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    (Original post by Munrot07)
    Officially (according to OCR) NAD = 2.5 ATP and FAD = 1.5ATP

    10 NAD = 25 ATP
    2 FAD = 3 ATP
    4 ATP from earlier

    32 overall
    In the book it says NAD =2.6
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    (Original post by tewas)
    why should there be no air bubbles in a photosynthometer?
    Would give an invalid result, because since a photosynthometer measures volume of oxygen collected in capillary tube, if there was an air bubble in there beforehand, then it would seem like more oxygen was produced than there actually was.
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    (Original post by leerachelll)
    guys, I'm confused about the neurones and how to label the parts. Especially the difference between the dendron and axon. And also are both sides of the neurone (motor and sensory) dendrites?
    Only sensory neurones have a dendron. The dendron goes from the receptor end to the cell body. The axon goes from the cell body towards the CNS. (Axon = away from cell body).

    I think at the effector end of a motor neurone and the CNS end of a sensory neurone they're called 'axon terminals', but I'm not 100% sure, will check my notes in a sec.

    EDIT: the branches are axon terminals, the swellings are neurotransmitter swellings. The diagrams in these notes are pretty clear for the labelling.

    http://www.thebiotutor.com/uploads/2...rves_notes.pdf
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    (Original post by Maham88)
    In the book it says NAD =2.6
    In my book it's always said 2.5 They must have updated it since I got mine. Perhaps 33 ATP are made then?
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    (Original post by Munrot07)
    In my book it's always said 2.5 They must have updated it since I got mine. Perhaps 33 ATP are made then?
    they don't even say how many ATP molecules FAD makes , and the total yield of ATP is 30 in the book .
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    what do we need to know about the experiment to measure rate of photosynthesis?
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    (Original post by Munrot07)
    In my book it's always said 2.5 They must have updated it since I got mine. Perhaps 33 ATP are made then?
    I would think that 32 ATP is a theoretical yield
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    Who is going to fail f215

    Posted from TSR Mobile
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    Guys how can you tell the difference when labelling myelin sheath or Schwann cell????
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    So does the Vagus nerve and Accelerator nerve connect the Sinoatrial node to the Medulla oblongata?
    Or do they connect the chemoreceptors and baroreceptors to the Medulla oblongata?
    Thanksss
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    (Original post by Maham88)
    they don't even say how many ATP molecules FAD makes , and the total yield of ATP is 30 in the book .
    They have definitely changed it since by time then. I think OCR have done a bit of lying to simplify things, they do that a lot. Doing some quick research online and from my university lectures it says NAD = 2.5 and FAD = 1.5. However, two of the molecules of NAD (the ones made in glycolysis) sometimes switch to 1.5 (apparently due to the fact one H+ is required to transport NADH into the mitochondria) so the yield is either 32 or 30 depending on the way those two NADs are so inclined.



    (Original post by WBN)
    I would think that 32 ATP is a theoretical yield
    Actually the theoretical yeild is about 38 as theoretically NAD = 3 and FAD = 2 however this is never achieved.
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    photosynthesis experiment?
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    (Original post by LMottram)
    So does the Vagus nerve and Accelerator nerve connect the Sinoatrial node to the Medulla oblongata?
    Yes. Accelerator nerve is for the sympathetic NS so triggers an increased heart rate. Vagus is for the parasympathetic NS so triggers a decreased heart rate.
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    (Original post by Munrot07)
    They have definitely changed it since by time then. I think OCR have done a bit of lying to simplify things, they do that a lot. Doing some quick research online and from my university lectures it says NAD = 2.5 and FAD = 1.5. However, two of the molecules of NAD (the ones made in glycolysis) sometimes switch to 1.5 (not sure why) so the yield is either 32 or 30 depending on the way those two NADs are so inclined.



    Actually the theoretical yeild is about 38 as theoretically NAD = 3 and FAD = 2 however this is never achieved.
    oh okay my teacher taught me that NAD=3 and FAD=2 and the book says NAD=2.5 , so confusing
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    (Original post by Maham88)
    oh okay my teacher taught me that NAD=3 and FAD=2 and the book says NAD=2.5 , so confusing
    I know it's insanely annoying. Go with whatever your book says as that is what OCR will expect in the exam. Just know that OCR lie to you a lot :P
 
 
 
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