True about facilitated diffusion-: (A) Active, (B) Requires carrier, (C) Requires ATP, (D) Against concentration gradient
Answer is B. Ans. is 'b' i.e., Requires carrier 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 (Uphill)ExocytosisNoYesN/A (not applicable)Endocytosis # Pinocytosis & PhagocytosisNoYesN/A# Receptor mediated endocytosisYesYesN/A