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Questions and Answers
What is the main characteristic of phospholipids that leads to their self-assembly into lipid bilayers?
What is the main characteristic of phospholipids that leads to their self-assembly into lipid bilayers?
- Their hydrophobic tails
- Their hydrophilic heads
- Their amphipathic nature (correct)
- Their fatty acid chain length
What is the effect of unsaturated fatty acid tails on the membrane?
What is the effect of unsaturated fatty acid tails on the membrane?
- They increase the membrane's permeability
- They make the membrane more rigid
- They result in a more fluid membrane (correct)
- They decrease the membrane's integrity
What is the approximate percentage of membrane lipids in animals that consist of cholesterol?
What is the approximate percentage of membrane lipids in animals that consist of cholesterol?
- 20%
- 10%
- 25% (correct)
- 30%
What is the role of cholesterol in the membrane?
What is the role of cholesterol in the membrane?
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What is the characteristic of phospholipid bilayers that allows them to form the hydrophobic core of the membrane?
What is the characteristic of phospholipid bilayers that allows them to form the hydrophobic core of the membrane?
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What is the result of the different lipid compositions in various membranes?
What is the result of the different lipid compositions in various membranes?
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