CHEM210 / CHEM 210 Module 5
(Latest Update )
Biochemistry | Questions & Answers
| Grade A | 100% Correct - Portage
Learning
Lipids and Membranes
Question:
What are phosphoglycerides?
Answer:
they are lipids found in the membrane. they consists of a group (usually
choline) and a phosphoric ester group attached to a glycerol molecule and 2
fatty acids
,Question:
What is the head of phosphoglycerides made of? are they polar or nonpolar
Answer:
made up of the choline, phosphoric ester and the glycerol. they hydrophilic
because they are polar and have charges (+ from the N in choline and - from
the O in phosphoric ester)
Question:
Why are phosphoglycerides considered amphipathic?
Answer:
because they are both water loving and water hating. they heads love the
water an the tails do not
Question:
What is the shape of phosphoglycerides? why?
Answer:
cone shape- this is because the heads make up the larger side of the cone and
the tails are pushed together via the hydrophobic effect so smaller in size
,Question:
What is the membrane called due to its double layer?
Answer:
the lipid bilayer
Question:
Why is the cone shape of phosphoglycerides helpful in membranes?
Answer:
because a line of them makes a natural curve
Question:
How does the membrane act like a barrier?
Answer:
due to its oily/hydrophobic inside, it does not allow sugars , water, and other
molecules to pass through
, Question:
What water does the membrane interact with?
Answer:
exterior- the water from the ECM
interior- the cytosol mostly H2O
Question:
What are Sphingolipids?
Answer:
they are very similar to phosphoglycerides because they contain a phosphoric
ester, a choline, and fatty acids. But they DO NOT contain glycerol, instead
they have a ceramide group
Question:
How does the ceramide group differ from a glycerol?
Answer:
very similar except is as one NH group instead o one of the OH groups
(Latest Update )
Biochemistry | Questions & Answers
| Grade A | 100% Correct - Portage
Learning
Lipids and Membranes
Question:
What are phosphoglycerides?
Answer:
they are lipids found in the membrane. they consists of a group (usually
choline) and a phosphoric ester group attached to a glycerol molecule and 2
fatty acids
,Question:
What is the head of phosphoglycerides made of? are they polar or nonpolar
Answer:
made up of the choline, phosphoric ester and the glycerol. they hydrophilic
because they are polar and have charges (+ from the N in choline and - from
the O in phosphoric ester)
Question:
Why are phosphoglycerides considered amphipathic?
Answer:
because they are both water loving and water hating. they heads love the
water an the tails do not
Question:
What is the shape of phosphoglycerides? why?
Answer:
cone shape- this is because the heads make up the larger side of the cone and
the tails are pushed together via the hydrophobic effect so smaller in size
,Question:
What is the membrane called due to its double layer?
Answer:
the lipid bilayer
Question:
Why is the cone shape of phosphoglycerides helpful in membranes?
Answer:
because a line of them makes a natural curve
Question:
How does the membrane act like a barrier?
Answer:
due to its oily/hydrophobic inside, it does not allow sugars , water, and other
molecules to pass through
, Question:
What water does the membrane interact with?
Answer:
exterior- the water from the ECM
interior- the cytosol mostly H2O
Question:
What are Sphingolipids?
Answer:
they are very similar to phosphoglycerides because they contain a phosphoric
ester, a choline, and fatty acids. But they DO NOT contain glycerol, instead
they have a ceramide group
Question:
How does the ceramide group differ from a glycerol?
Answer:
very similar except is as one NH group instead o one of the OH groups
