Transport mechanism which requires carrier protein but no energy -: (A) Simple diffusion, (B) Facilitated diffiisiun, (C) Osmosis, (D) Active transport
Answer is B. Ans. is 'b' i.e., Facilitated diffusiun Types of transport across cell membrane Carrier protein involvedEnergy requiredConcentration gradientSimple diffusionNoNoAlong (Down hill)Osmosis (Diffusion of H2O)NoNoAlong (Down hill)Facilitated diffusionYesNoAlong (Down hill)Active transportYesYesAgainst (Up hill)ExocytosisNoYesN/A (not applicable)Endocytosis # Pinocytosis & Phagocytosis# Receptor mediated endocytosisNoYesYesYesN/AN/A