STRUCTURE AND FUNCTION OF CELLS MEMBRANE
FINAL EXAM GUIDE 2025
|MOST COMMON QUESTIONS WITH CORRECTLY
VERIFIED ANSWERS|ALREADY A+
GRADED|GUARANTEED PASS
Cell Membrane - Boundary controlling substance movement in cells.
Selective Permeability - Allows certain substances to cross more easily.
Fluid Mosaic Model - Describes membrane structure with moving phospholipids and
proteins.
Phospholipid Bilayer - Double layer forming stable boundary between compartments.
Hydrophilic Region - Water-attracting part of phospholipid molecules.
Hydrophobic Region - Water-repelling part of phospholipid molecules.
Saturated Phospholipids - Increase membrane rigidity, reducing fluidity.
Unsaturated Phospholipids - Enhance membrane fluidity by preventing tight packing.
Cholesterol - Regulates membrane fluidity at varying temperatures.
Glycolipids - Lipids with carbohydrate chains for cell recognition.
Glycoproteins - Proteins with carbohydrate chains aiding cell communication.
Cell Signalling - Process of communication leading to specific cellular responses.
Passive Transport - Movement of substances without energy expenditure.
Active Transport - Movement of substances requiring energy input.
Endocytosis - Process of cellular intake of substances.
Exocytosis - Process of expelling substances from the cell.
Water Potential - Potential energy of water in a system.
, Solute Potential - Effect of solute concentration on water potential.
Pressure Potential - Physical pressure affecting water potential in cells.
Antigens - Cell markers for identification and recognition.
Membrane Stability - Maintained by cholesterol and phospholipid interactions.
ABO blood group antigens - Glycolipids and glycoproteins with carbohydrate variations.
Receptor molecules - Bind specific substances at cell surfaces.
Intrinsic proteins - Proteins spanning the entire membrane layer.
Extrinsic proteins - Proteins on inner or outer membrane surfaces.
Hydrophobic regions - Portions of proteins that cross the membrane.
Amphipathic proteins - Proteins with both hydrophilic and hydrophobic regions.
Transport proteins - Facilitate passage of ions and polar molecules.
Channel proteins - Provide hydrophilic channels for molecule transport.
Carrier proteins - Transport specific substances across the membrane.
Enzymatic activity - Membrane proteins acting as enzymes for reactions.
Cell-cell recognition - Glycoproteins as identification tags for cells.
Signal transduction - Binding of messengers alters protein shape, relaying signals.
Intercellular joining - Proteins connect adjacent cells in junctions.
Cytoskeleton attachment - Proteins linking to filaments maintaining cell shape.
Signaling - Transmitting messages from one location to another.
Signaling pathways - Processes coordinating cell activities over distances.
Ligand - Signaling molecule that binds to receptors.
Receptor - Protein that receives signaling molecules (ligands).
Small, hydrophobic ligands - Molecules entering cells, binding to intracellular receptors.
Steroid hormones - Important small ligands binding to intracellular receptors.
FINAL EXAM GUIDE 2025
|MOST COMMON QUESTIONS WITH CORRECTLY
VERIFIED ANSWERS|ALREADY A+
GRADED|GUARANTEED PASS
Cell Membrane - Boundary controlling substance movement in cells.
Selective Permeability - Allows certain substances to cross more easily.
Fluid Mosaic Model - Describes membrane structure with moving phospholipids and
proteins.
Phospholipid Bilayer - Double layer forming stable boundary between compartments.
Hydrophilic Region - Water-attracting part of phospholipid molecules.
Hydrophobic Region - Water-repelling part of phospholipid molecules.
Saturated Phospholipids - Increase membrane rigidity, reducing fluidity.
Unsaturated Phospholipids - Enhance membrane fluidity by preventing tight packing.
Cholesterol - Regulates membrane fluidity at varying temperatures.
Glycolipids - Lipids with carbohydrate chains for cell recognition.
Glycoproteins - Proteins with carbohydrate chains aiding cell communication.
Cell Signalling - Process of communication leading to specific cellular responses.
Passive Transport - Movement of substances without energy expenditure.
Active Transport - Movement of substances requiring energy input.
Endocytosis - Process of cellular intake of substances.
Exocytosis - Process of expelling substances from the cell.
Water Potential - Potential energy of water in a system.
, Solute Potential - Effect of solute concentration on water potential.
Pressure Potential - Physical pressure affecting water potential in cells.
Antigens - Cell markers for identification and recognition.
Membrane Stability - Maintained by cholesterol and phospholipid interactions.
ABO blood group antigens - Glycolipids and glycoproteins with carbohydrate variations.
Receptor molecules - Bind specific substances at cell surfaces.
Intrinsic proteins - Proteins spanning the entire membrane layer.
Extrinsic proteins - Proteins on inner or outer membrane surfaces.
Hydrophobic regions - Portions of proteins that cross the membrane.
Amphipathic proteins - Proteins with both hydrophilic and hydrophobic regions.
Transport proteins - Facilitate passage of ions and polar molecules.
Channel proteins - Provide hydrophilic channels for molecule transport.
Carrier proteins - Transport specific substances across the membrane.
Enzymatic activity - Membrane proteins acting as enzymes for reactions.
Cell-cell recognition - Glycoproteins as identification tags for cells.
Signal transduction - Binding of messengers alters protein shape, relaying signals.
Intercellular joining - Proteins connect adjacent cells in junctions.
Cytoskeleton attachment - Proteins linking to filaments maintaining cell shape.
Signaling - Transmitting messages from one location to another.
Signaling pathways - Processes coordinating cell activities over distances.
Ligand - Signaling molecule that binds to receptors.
Receptor - Protein that receives signaling molecules (ligands).
Small, hydrophobic ligands - Molecules entering cells, binding to intracellular receptors.
Steroid hormones - Important small ligands binding to intracellular receptors.
