1) Which of the following best describes facilitated diffusion? a) Movement of molecules from a region of low concentration to high concentration with the help of ATP b) Passive transport of molecules across a membrane with the assistance of transport proteins c) Movement of water molecules across a membrane from high solute concentration to low solute concentration d) Transport of large molecules directly through the lipid bilayer without assistance 2) Facilitated diffusion is necessary for the movement of: a) Small, nonpolar molecules like oxygen and carbon dioxide b) Large or polar molecules that cannot easily cross the lipid bilayer c) Any type of molecule moving against the concentration gradient d) Water molecules only 3) What is the primary difference between simple diffusion and facilitated diffusion? a) Facilitated diffusion requires energy from ATP, while simple diffusion does not b) Facilitated diffusion involves protein carriers or channels, while simple diffusion does not c) Simple diffusion moves molecules from low to high concentration, while facilitated diffusion does not d) Facilitated diffusion only occurs in prokaryotic cells 4) Which of the following is a characteristic of facilitated diffusion? a) It requires cellular energy in the form of ATP b) It moves molecules against the concentration gradient c) It uses membrane proteins to assist the movement of certain molecules d) It can only transport water molecules 5) In facilitated diffusion, the movement of molecules continues until: a) The molecules are evenly distributed on both sides of the membrane b) All molecules have moved to one side of the membrane c) The ATP supply is depleted d) The membrane proteins are saturated with molecules 6) Which of the following molecules is most likely to require facilitated diffusion to cross a cell membrane? a) Oxygen b) Carbon dioxide c) Glucose d) Fatty acids 7) Facilitated diffusion typically involves which types of membrane proteins? a) Aquaporins and ion channels b) ATP synthase and ion pumps c) Enzymes that catalyse reactions d) Ribosomes that produce proteins

Facilitated Diffusion

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