Class notes
Cmy 117 - Fatty acid metabolism notes
- Course
- Institution
This is a comprehensive and detailed note on Fatty acid metabolism for cmy 117. Quality stuff!! U'll need it!!
[Show more]
Seller
Follow
anyiamgeorge19
Reviews received
Content preview
Fatty acid metabolismA2- 2003
14. What is the origin and function of chylomicrons?
(3)
Chylomicrons are formed in the ER of liver cells when fatty acids from a meal are
reassembled into fat and this becomes part of the forming chylomicron. They are
secreted into the interstitial spaces from where they are collected into the lymph
system for transport in the blood to tissues that will metabolised the fat.
15. When is the following reaction required and what kind of enzyme catalyses it?
(1)
This reaction is required during the ß-oxidation of unsaturated fatty acids and it is
catalysed by an isomerase
16. State two differences between fatty-acid oxidation and synthesis.
(2)
Oxidation occurs in the mitochondrial matrix and synthesis in the cytosol.
For synthesis, the involved enzymes are combined in an enzyme complex
(synthase) whereas oxidation is catalysed by non-linked enzymes
17. What process is stimulated by glucagon and under what conditions does this
happen? (2)
, Glucagon is secreted under conditions of stress/starvation when the body needs
energy. It stimulates fatty-acid oxidation
18. Explain why the re-oxidation of a molecule of mitochondrial NADH by the
mitochondrial electron transport chain results in the generation of 3 ATP
molecules, while the re-oxidation of a molecule of FADH2 by the electron
transport chain results in the generation of 2 ATP molecules. (4)
Re-oxidation of FADH2 results in the transfer of electrons to coenzyme Q,
which transfers the electrons to Complex III.
Transfer of electrons from coenzyme Q to O2 (through Complexes III & IV)
generates sufficient energy to synthesise 2 ATP molecules.
Re-oxidation of mitochondrial NADH results in the transfer of electrons to
Complex I.
Transfer of electrons from mitochondrial NADH to O2 (through Complexes I, III
& IV) generates sufficient energy to synthesise 3 ATP molecules
A3 – 2004
Question 1
(a) State what molecular properties of bile salts underlie their function.
(1)
It is an amphiphilic molecule
(b) State in what form absorbed fat is transported to the liver.
(1)
It is incorporated in a chylomicron particle
(c) State what conditions lead to the mobilisation of stored fat.
(1)
Condition of starvation, exercise or stress
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller anyiamgeorge19. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.50. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75759 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now