week2quiz

week2quiz - 1. To maintain membrane fluidity, vertebrates,...

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1. To maintain membrane fluidity, vertebrates, such as deep ocean fish, that live in a very cold environment need to have a. Higher degree of lipid unsaturation b. Higher concentration of cholesterol in their membrane than they would in a moderate temperature environment c. Shorter fatty acid lipid chains d. A and B e. All of the above 2. Fluidity of a membrane depends on the a. Composition of the lipid bilayer b. Temperature of the outside environment c. Amount of water surrounding the membrane d. A and B e. All of the above 3. Phospholipids of the plasma membranes are a. Hydrophobic b. Hydrophilic c. Amphiphilic d. None of the above 4. Plasma membranes are least permeable to a. O 2 b. Glucose c. H 2 O d. Na + e. The plasma membrane is equally permeable to the above listed molecules 5. The main phospholipids in an animal cell, phosphoglycerides, are made of the following except : a. Fatty acid tail b. Phosphate group c. Glycerol backbone d. Hydrophilic head group e. Phosphoglycerides are made of all of the above
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week2quiz - 1. To maintain membrane fluidity, vertebrates,...

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