Transport mechanism which requires carrier protein but no energy -
Simple diffusion
Facilitated diffiisiun
Osmosis
Active transport
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
Transport Across Cell Membrane