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Questions and Answers
What molecules are the constituents of biological membranes?
What molecules are the constituents of biological membranes?
- Carbohydrates, nucleic acids, and amino acids
- Lipids, amino acids, and proteins
- Lipids, proteins, and carbohydrates (correct)
- Proteins, nucleic acids, and lipids
Why do lipids establish the physical integrity of the membrane?
Why do lipids establish the physical integrity of the membrane?
- To create a barrier for hydrophobic materials (correct)
- To allow rapid passage of hydrophilic materials
- To enhance the movement of carbohydrates within the membrane
- To prevent the movement of proteins within the membrane
What model describes the general design of biological membranes?
What model describes the general design of biological membranes?
- Dynamic mesh model
- Rigid barrier model
- Solid crystal model
- Fluid mosaic model (correct)
Which part of a phospholipid interacts with the aqueous environment?
Which part of a phospholipid interacts with the aqueous environment?
What is a characteristic of some membranes with regard to protein content?
What is a characteristic of some membranes with regard to protein content?
Which molecule forms the hydrophobic core of the membrane?
Which molecule forms the hydrophobic core of the membrane?
What is the thickness of a biological membrane, as mentioned in the text?
What is the thickness of a biological membrane, as mentioned in the text?
In a biological membrane, what makes for a less dense and more fluid packing of the fatty acids in the lipid bilayer?
In a biological membrane, what makes for a less dense and more fluid packing of the fatty acids in the lipid bilayer?
Which component is important for membrane integrity and modulates membrane fluidity according to the text?
Which component is important for membrane integrity and modulates membrane fluidity according to the text?
What effect does having shorter-chain fatty acids, unsaturated fatty acids, or less cholesterol have on membrane fluidity?
What effect does having shorter-chain fatty acids, unsaturated fatty acids, or less cholesterol have on membrane fluidity?
Why is spontaneous phospholipid flip-flop from one half of the bilayer to the other rare?
Why is spontaneous phospholipid flip-flop from one half of the bilayer to the other rare?
How does temperature affect membrane fluidity?
How does temperature affect membrane fluidity?
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