All of the statements below about lipids are true, except one. Which one of the statements below is FALSE? Unsaturated fats contain only single bond Dietary lipids are hydrophobic Fatty acid tails that have only single bonds are more likely to be solids at room temperature Membrane lipids are amphipathic Saturated fats are found mostly in animal cells As discussed in class, proteins evolve over time in families. What is the same about proteins that are members of the same family? They all have the same primary structure They can be easily separated by centrifugation They all have similar protein domains (active sites) They are all found in the same cell type They are defined in terms of their quaternary structure Which of the main functions of cell signaling cascades listed below refers to the fact that a single cell signalling molecule can often turn on many molecules of the next protein in the signalling cascade? This function can lead to a large response in the cell from a limited number of initial signalling molecules. Group of answer choices cross-talk integrate distribute relay amplify
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Which of the following statements about animal cell lipids is false? Fats are a form of lipid that function to store energy. Many lipids function as enzymes. Cholesterol is a type of lipid that is a component of cell membranes and steroid hormones. Phospholipids are important components of cell membranes.
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Which of the following statements are correct? Explain your answers. A. Lipids in a lipid bilayer spin rapidly around their long axis. B. Lipids in a lipid bilayer rapidly exchange positions with one another in their own monolayer. C. Lipids in a lipid bilayer do not flip-flop readily from one lipid monolayer to the other D. Hydrogen bonds that form between lipid head groups and water molecules are continually broken and re-formed. E. Glycolipids move between different membrane-enclosed compartments during their synthesis but remain restricted to one side of the lipid bilayer. F. Margarine contains more saturated lipids than the vegetable oil from which it is made. G. Some membrane proteins are enzymes. H. The sugar layer that surrounds all cells makes cells more slippery.
Which of the following is true of unsaturated fats? a. They are more common in animals than in plants. b. They have double bonds in the carbon chains of their fatty acids. c. They generally solidify at room temperature. d. They contain more hydrogen than do saturated fats having the same number of carbon atoms.
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