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Questions and Answers
What is the outcome of the binding of biologically active substances to receptors?
What is the outcome of the binding of biologically active substances to receptors?
- The receptor is broken down into smaller components
- The substrate is inhibited by the receptor
- The receptor is released into the bloodstream
- The action is initiated within the cell (correct)
What is the function of the LDL receptor in the cell?
What is the function of the LDL receptor in the cell?
- To synthesize LDL in the cell
- To facilitate the uptake of cholesterol from the bloodstream (correct)
- To break down cholesterol in the cell
- To inhibit the action of the receptor
What happens when there is an oversupply of cholesterol in the cell?
What happens when there is an oversupply of cholesterol in the cell?
- The LDL receptor protein is inhibited (correct)
- The LDL receptor protein is synthesized
- The LDL receptor protein is broken down
- The LDL receptor protein is released into the bloodstream
What is the result of an insufficient number of LDL receptors in the cell?
What is the result of an insufficient number of LDL receptors in the cell?
What is the function of the protein in the LDL molecule?
What is the function of the protein in the LDL molecule?
What is the characteristic of the binding sites of membrane receptors?
What is the characteristic of the binding sites of membrane receptors?
What type of membrane protein is embedded in a membrane and can be removed by treatment with detergents or extensive sonication?
What type of membrane protein is embedded in a membrane and can be removed by treatment with detergents or extensive sonication?
What is the function of receptor proteins in a cell?
What is the function of receptor proteins in a cell?
What is the primary function of transport proteins in a cell?
What is the primary function of transport proteins in a cell?
What type of protein is bound to the outside of a membrane by polar or electrostatic interactions?
What type of protein is bound to the outside of a membrane by polar or electrostatic interactions?
What is the term used to describe the lateral motion of components in a membrane?
What is the term used to describe the lateral motion of components in a membrane?
What is the function of anchoring proteins in a cell?
What is the function of anchoring proteins in a cell?
What is the primary function of a lipid bilayer in a cell membrane?
What is the primary function of a lipid bilayer in a cell membrane?
What is the term used to describe the process by which a molecule or ion moves through an opening or pore in a membrane?
What is the term used to describe the process by which a molecule or ion moves through an opening or pore in a membrane?
What is the term used to describe the process by which substances enter a cell by binding to a carrier protein?
What is the term used to describe the process by which substances enter a cell by binding to a carrier protein?
What is the term used to describe the model in which proteins and a lipid bilayer exist side by side without covalent bonds between them?
What is the term used to describe the model in which proteins and a lipid bilayer exist side by side without covalent bonds between them?
What is the primary function of cell membranes in cells?
What is the primary function of cell membranes in cells?
What is the main force driving the formation of lipid bilayers?
What is the main force driving the formation of lipid bilayers?
What is the characteristic of the arrangement of hydrocarbon chains in saturated fatty acids?
What is the characteristic of the arrangement of hydrocarbon chains in saturated fatty acids?
What is the effect of cholesterol on the order and rigidity of lipid bilayers?
What is the effect of cholesterol on the order and rigidity of lipid bilayers?
What is characteristic of animal membranes compared to plant membranes?
What is characteristic of animal membranes compared to plant membranes?
What is the effect of a phase transition on the surface area of a lipid bilayer?
What is the effect of a phase transition on the surface area of a lipid bilayer?
What is the difference between the membranes of prokaryotes and eukaryotes?
What is the difference between the membranes of prokaryotes and eukaryotes?
What is the role of membrane proteins in biological membranes?
What is the role of membrane proteins in biological membranes?
What is the characteristic of the enzymes found in biological membranes?
What is the characteristic of the enzymes found in biological membranes?
What is the arrangement of lipid molecules in a lipid bilayer?
What is the arrangement of lipid molecules in a lipid bilayer?
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