Cell Structure and Function Quiz

• It increases membrane rigidity only
• It decreases membrane permeability only
• It maintains membrane fluidity at varying temperatures
• It has no effect on membrane structure

• Fixed positions of all proteins
• Rigid bilayer with no movement
• Lateral movement of lipids and proteins
• Only vertical movement of components

• Deeply embedded in the membrane
• Covalently bonded to lipids
• Loosely attached to the membrane surface
• Floating freely in the cytoplasm

• Phosphate group
• Glycerol backbone
• Sugar molecule
• Fatty acid chains

• They are loosely bound to the surface
• They are always on the outer side
• They are soluble in water
• They are embedded in the membrane