Podcast
Questions and Answers
What effect does the addition of cholesterol have on animal cell membranes?
What effect does the addition of cholesterol have on animal cell membranes?
- Increase membrane permeability to polar molecules
- Increase fluidity
- Decrease fluidity
- Decrease membrane permeability to water (correct)
How do cis-double bonds in phospholipids affect membrane fluidity at lower temperatures?
How do cis-double bonds in phospholipids affect membrane fluidity at lower temperatures?
- Increase fluidity (correct)
- Decrease fluidity
- Increase lipid tail interactions
- Increase tight packing
What is the impact of shorter hydrocarbon tails in phospholipids on membrane fluidity at lower temperatures?
What is the impact of shorter hydrocarbon tails in phospholipids on membrane fluidity at lower temperatures?
- Increase fluidity (correct)
- Increase lipid tail interactions
- Increase tight packing
- Decrease fluidity
Which factor decreases the mobility of phospholipid tails in the lipid bilayer?
Which factor decreases the mobility of phospholipid tails in the lipid bilayer?
In terms of fluidity, what is the primary role of phospholipid tail length in the membrane?
In terms of fluidity, what is the primary role of phospholipid tail length in the membrane?
How does the presence of cis-double bonds affect membrane fluidity?
How does the presence of cis-double bonds affect membrane fluidity?
What is the primary function of liposomes?
What is the primary function of liposomes?
In a phospholipid bilayer, which part of the phospholipid interacts with water?
In a phospholipid bilayer, which part of the phospholipid interacts with water?
Cell membrane fluidity is carefully regulated because it is important for which of the following?
Cell membrane fluidity is carefully regulated because it is important for which of the following?
What happens to phospholipids within each leaflet in terms of movement in a cell membrane?
What happens to phospholipids within each leaflet in terms of movement in a cell membrane?
Which technique is used to manipulate the cell membrane without causing damage?
Which technique is used to manipulate the cell membrane without causing damage?
What structures can pure phospholipids form according to the text?
What structures can pure phospholipids form according to the text?
Why do enzymes in the ER membrane flip lipids from one leaflet to the other?
Why do enzymes in the ER membrane flip lipids from one leaflet to the other?
Which protein catalyzes rapid flip-flop of random phospholipids from one leaflet to the other?
Which protein catalyzes rapid flip-flop of random phospholipids from one leaflet to the other?
What is the function of phospholipids synthesized in the cytosolic leaflet of the endoplasmic reticulum?
What is the function of phospholipids synthesized in the cytosolic leaflet of the endoplasmic reticulum?
What is the role of glycolipids in the lipid bilayer of an animal cell plasma membrane?
What is the role of glycolipids in the lipid bilayer of an animal cell plasma membrane?
How are phospholipids and glycolipids distributed in the lipid bilayer of an animal cell plasma membrane?
How are phospholipids and glycolipids distributed in the lipid bilayer of an animal cell plasma membrane?
What property of membranes do glycoprotein membranes retain during transfer between cell compartments?
What property of membranes do glycoprotein membranes retain during transfer between cell compartments?
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