Turn on thread page Beta
    • Thread Starter
    Offline

    1
    ReputationRep:
    according to the OCR a2 biology book, respiring fatty acids and glucose is pretty much the same, you just need to convert the fatty acids into acetate first. so why would lipids produce more atp?
    Offline

    20
    ReputationRep:
    Look at the energetics of the chemical bonds.
    Offline

    21
    ReputationRep:
    (Original post by manic.high.girl)
    according to the OCR a2 biology book, respiring fatty acids and glucose is pretty much the same, you just need to convert the fatty acids into acetate first. so why would lipids produce more atp?
    Hi! I moved this to the Biology forum for you
    Offline

    5
    ReputationRep:
    Lipids produce more ATP due to the fact that they tend to have more hydrogen atoms attached to the main structure compared to polysaccharides. More hydrogen atoms means that they can donate more protons to NAD and FAD. This produces more reduced NAD and reduced FAD. The greater concentrations in these coenzymes results in a larger electrochemical gradient at the cristae during oxidative phosphorylation (as well as the fact more reduced NAD means more protons are pumped into the intermembrane space). These all cumulates to a greater drive of proton flow in chemiosmosis, through ATP synthase, resulting in more ATP being manufactured.
    [That explanation may have been quite long and overly-complex but I hope this helped ]
    Offline

    11
    ReputationRep:
    Do you need to know this? It's technically because fatty acids undergo a thing called "beta oxidation", where they are converted into a load of acetyl CoAs, which can then go on to feed the krebs cycle as usual. Seems a bit complicated for A-level though!
    Offline

    5
    ReputationRep:
    (Original post by AortaStudyMore)
    Do you need to know this? It's technically because fatty acids undergo a thing called "beta oxidation", where they are converted into a load of acetyl CoAs, which can then go on to feed the krebs cycle as usual. Seems a bit complicated for A-level though!
    It's not a point within the specification however it is detailed within the OCR-endorsed textbook and has appeared on a couple of past papers.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: May 11, 2016

University open days

  • Sheffield Hallam University
    City Campus Postgraduate
    Wed, 17 Oct '18
  • Staffordshire University
    Nursing and Midwifery Undergraduate
    Wed, 17 Oct '18
  • Teesside University
    Undergraduate open day Undergraduate
    Wed, 17 Oct '18
Poll
If a uni gives me an unconditional offer they....

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

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