Indicate whether the following statement is true or false. Although cholesterol is a hydrophobic
molecule, it has a hydrophilic head group like all other membrane lipids.
A) True B) False
True
Indicate whether the following statement is true or false. Phosphatidylserine is the most
abundant type of phospholipid found in cell membranes.
A) True B) False
False.
Phosphatidylcholine is the most abundant phospholipid found in cell membranes.
Indicate whether the following statement is true or false. Glycolipids lack the glycerol component
found in phospholipids.
A) True B) False
True
Indicate whether the following statement is true or false. The highly ordered structure of the lipid
bilayer makes its generation and maintenance energetically unfavorable.
A) True B) False
False.
The formation of a lipid bilayer is energetically favorable.
Which of the following membrane lipids does not contain a fatty acid tail?
A) Phosphatidylcholine
B) A glycolipid
C) Phosphatidylserine
D) A phospholipid
E) Cholesterol
E) Cholesterol
Formation of a lipid bilayer might seem to be energetically unfavorable. However, this arrangement is
actually favored because it allows a higher level of entropy than any other alternative. What makes
bilayer formation energetically favorable?
A) Polar h
B) Water molecules form cage-like structures around hydrophobic molecules
Membrane lipids are capable of many different types of movement. Which of these does not occur
spontaneously in biological membranes?
A) switching between lipid layers
B) lateral movement
C) rotation clockwise
D) flexing of hydrocarbon chains
E) rotation
A) switching between lipid layers
A group of membrane proteins can be extracted from membranes only by using detergents. All the
proteins in this group have a similar amino acid sequence at their C-terminus: -KKKKKXXC (where K
stands for lysine, X stands for any amino acid, and C stands f
A) The cysteine residue is covalently attached to a membrane lipid.
Which of the following statements about the carbohydrate coating of the cell surface is false?
A) It is not usually found on the cytosolic side of the membrane.
B) It can play a role in cell-cell adhesion.
C) The arrangement of the oligosaccharide side ch
C) The arrangement of the oligosaccharide side chains is highly ordered, much like the peptide
bonds of a polypeptide chain.
(the sugars in an oligosaccharide side chain attached to the cell surface can be joined together in
many different ways and in var