LIBERTY UNIVERSITY MSCI 660
INTRACELLULAR MEMBRANE TRAFFIC
AND CELLULAR SORTING QUIZ 2026
QUESTIONS WITH COMPLETE SOLUTIONS
FULL REVIEW GRADED A+
⩥ light/electron microscope but it has to be stained first.
Answer: Cell can be visible though what?
⩥ eukaryotic cells contain envelope and compartment
- it must be "compartmentalized" due to "differences" in "biochemical
compositions".
Answer: What features distinguish eukaryotic and prokaryotic cell?
⩥ lipid bilayer.
Answer: What is this?
⩥ - hydrophilic head = polar
- hydrophobic tail = non-polar.
Answer: What does lipid bilayer contain?
Please state which is polor and non-polar
,⩥ - choline
- phosphate
- glycerol
from top to bottom.
Answer: What does hydrophilic head contain ?
⩥ one head has 2 tails
- one tail = hydrocarbon that consists of single bond only
- one tail = hydrocarbon that contains double bond.
Answer: What does hydrophilic tail contain ?
⩥ proteins are inserted into phospholipid bilayer.
Answer: In fluid mosaic model, what is the proposal made in regarding
to "protein"?
⩥ it is a phosphate containing, hydrophilic head linked to a pair of
hydrophobic tail.
Answer: What is the definition of phospholipid?
⩥ the small molecule choline attached to phosphate groups as its
hydrophilic head.
,Answer: What is the definition of phosphadylcholine?
⩥ molecules with both hydrophilic and hydrophobic parts.
Answer: What is the definition of amphipathic?
⩥ - a molecule that has a sugar (oligosaccharides) covelently link to
lipid as their hydrophobic head
- its main role is cell recognition & cell-cell interjection.
Answer: What is the definition of glycolipid and its role?
⩥ - a molecule that has a sugar (oligosaccharides) covalently link to
protein as hydrophilic head
-its main role is cell-cell recognition & binding site.
Answer: What is the definition of glycoprotein and its role?
⩥ 1. cholesterol is embedded between neighbouring phospholipid
molecule as it is short and rigid
2. cholesterol makes bilayer to become both less flexible and permeable.
Answer: What are 2 functions of cholesterol ?
, ⩥ lipid membrane can change its shape easily.
Answer: Can lipid membrane change shape?
⩥ 1. cell membrane are in liquid "crystal state"
2. soft at room temperature
3. fluid-like and it is constantly in motion
4. membrane is a symmetrical
5. selective permeable.
Answer: What are the 5 features of cell membrane?
⩥ - temperature
- lipid composition.
Answer: What factors can effect membrane fluidity? (2)
⩥ high temperature = hydrophobic tail will be free to move
low temperature = movement of molecule will be restricted ->
crystalline gel.
Answer: How can temperature effect membrane fluidity?
⩥ phosphadylcholine & sphingomyelin
length of fatty acid chain
INTRACELLULAR MEMBRANE TRAFFIC
AND CELLULAR SORTING QUIZ 2026
QUESTIONS WITH COMPLETE SOLUTIONS
FULL REVIEW GRADED A+
⩥ light/electron microscope but it has to be stained first.
Answer: Cell can be visible though what?
⩥ eukaryotic cells contain envelope and compartment
- it must be "compartmentalized" due to "differences" in "biochemical
compositions".
Answer: What features distinguish eukaryotic and prokaryotic cell?
⩥ lipid bilayer.
Answer: What is this?
⩥ - hydrophilic head = polar
- hydrophobic tail = non-polar.
Answer: What does lipid bilayer contain?
Please state which is polor and non-polar
,⩥ - choline
- phosphate
- glycerol
from top to bottom.
Answer: What does hydrophilic head contain ?
⩥ one head has 2 tails
- one tail = hydrocarbon that consists of single bond only
- one tail = hydrocarbon that contains double bond.
Answer: What does hydrophilic tail contain ?
⩥ proteins are inserted into phospholipid bilayer.
Answer: In fluid mosaic model, what is the proposal made in regarding
to "protein"?
⩥ it is a phosphate containing, hydrophilic head linked to a pair of
hydrophobic tail.
Answer: What is the definition of phospholipid?
⩥ the small molecule choline attached to phosphate groups as its
hydrophilic head.
,Answer: What is the definition of phosphadylcholine?
⩥ molecules with both hydrophilic and hydrophobic parts.
Answer: What is the definition of amphipathic?
⩥ - a molecule that has a sugar (oligosaccharides) covelently link to
lipid as their hydrophobic head
- its main role is cell recognition & cell-cell interjection.
Answer: What is the definition of glycolipid and its role?
⩥ - a molecule that has a sugar (oligosaccharides) covalently link to
protein as hydrophilic head
-its main role is cell-cell recognition & binding site.
Answer: What is the definition of glycoprotein and its role?
⩥ 1. cholesterol is embedded between neighbouring phospholipid
molecule as it is short and rigid
2. cholesterol makes bilayer to become both less flexible and permeable.
Answer: What are 2 functions of cholesterol ?
, ⩥ lipid membrane can change its shape easily.
Answer: Can lipid membrane change shape?
⩥ 1. cell membrane are in liquid "crystal state"
2. soft at room temperature
3. fluid-like and it is constantly in motion
4. membrane is a symmetrical
5. selective permeable.
Answer: What are the 5 features of cell membrane?
⩥ - temperature
- lipid composition.
Answer: What factors can effect membrane fluidity? (2)
⩥ high temperature = hydrophobic tail will be free to move
low temperature = movement of molecule will be restricted ->
crystalline gel.
Answer: How can temperature effect membrane fluidity?
⩥ phosphadylcholine & sphingomyelin
length of fatty acid chain
