Exam (elaborations)
BMSC 230 Module 10 questions with correct answers 2024/2025
- Course
- Institution
BMSC 230 Module 10 questions with correct answers 2024/2025
[Show more]
Content preview
BMSC 230 Module 10How are phospholipids and triglycerols similar? - ANSboth have a glycerol backbone where fatty
acids are linked
What is the difference between phospholipids and triglycerols? - ANStriglycerol- 3 fatty acids are
attached to the 3 carbons
phospholipids- only 2 fatty acids are attached to carbons
and it has a phosphate head group on 3rd carbon
what is a common precursor for both classes of lipids? - ANSglycerol 3 phosphate
where can the glycerol 3 phosphate be derived from? - ANSglycerol released from the adipose
when triglycerol is degraded
from the conversion of dihydroxyacetone phosphate (in liver and other tissues)
what does the synthesis of phosphatidate from glycerol 3-P consist of? - ANS2 consecutive
additions of fatty acids to carbon 1 and 2
what kind of bond are the fatty acids attached to on the 1 and 2 carbons on the phosphatidate
molecule? - ANSester linkages
what kind of fatty acid is on 1 and 2 carbons? - ANScarbon 1- saturated fatty acid
carbon 2- unsaturated fatty acid
what does carbon 3 have? - ANSthe head phosphate group
what will carbon 3 and the head phosphate group do? - ANSwill facilitate addition of different
head groups to form different head groups to form different phospholipids
what are the conversion stages of glycerol 3 phosphate to phosphatidate? - ANSglycerol 3 P -->
lysophosphatidate --> phosphatidate
what catalyzes the reaction of phosphatidase conversion to triacylglycerol? - ANStriacylglycerol
synthetase
where is triacylglycerol synthetase located? - ANSin the ER membrane
What is the first step of the conversion of phosphatidate to triacylglycerol? - ANSphosphate
group is cleaved off
to from dicylglycerol
, What is the second step? - ANSthe third fatty acid is linked to carbon 3 to form triacylglycerol
What serves as an activated substrate? - ANSCoA derivative
What happens to triacylglycerol under normal conditions? - ANSgets synthesized in liver and
then sent to muscle for fuel or to adipose tissue where it is stored for future energy needs
what are some common phospholipids? - ANSphosphatidylcholine
phosphatidylethanolamine
phosphatidylserine
phosphatidylinositol
how do phospholipids differ? - ANShead group attached to the phosphate group on the third
carbon
what are phospholipids? - ANSamphiphilic
very non-polar region due to 2 fatty acid chains and a highly polar head group
where does phospholipid synthesis take place? - ANSendoplasmic reticulum
what does phospholipid synthesis use as a precursor? - ANSphosphatidate to where alcohol is
linked
what do lipids rely on for it to become activated? - ANSeither diacylglycerol or the alcohol group
linked to CDP
depending on reactant
how is diacylglycerol activated? - ANSby linking a CDP molecule to it
What happens after diacylglycerol is activated? - ANSphosphatidate reacts with CTP to form
CDP-diacylglycerol
the pyrophosphate released becomes hydrolyzed in the cell to 2 Pi
the energy released from this hydrolysis drives reaction forward
what drives the conversion of phosphatidate to CDP-diacylglycerol forward? - ANSenergy
released from the hydrolysis of pyrophosphate
what does the CDP-diacylglycerol then do? - ANSreacts with an alcohol such as choline to form
the phospholipid with the release of CMP
What happens in the case of mammals, what gets activated instead of the diacylglycerol? -
ANSthe alcohol gets activated by linking it to the CDP
what is the most abundant phospholipid in animals? - ANSphosphatidylcholine
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 QualityPDF. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79373 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now