Movement of Substances across a Plasma Membrane

Question 1:Diagram I and Diagram II show the movement of substances P and Q across the plasma membrane respectively. The movement of P needs energy but the movement of Q does not.(a) Name the processes involved in the movement of P and Q. (2 marks)(b)(i) Name one example of P and Q. (2 marks)(b)(ii) Describe … Read more

Question 1:Diagram I and Diagram II show two different types of movement of substances across the plasma membrane.(a) In Diagram I. label the following structures:Phospholipid bilayer, with letter RCarrier protein, with letter S [2 marks] (b) State two characteristics of the phospholipid bilayer. [2 marks](c) Name the process of the movement of substances across the … Read more

What is Hypertonic Solution?Hypertonic solution is the solution that has lower water potential than the other solution.Water Concentration and Solute Concentration of a Cell in a Hypertonic SolutionWater concentration: Water concentration inside the cell is higher than outside the cell.Solute Concentration: Solute concentration inside the cell is lower than outside the cell.Effect of Hypertonic Solution … Read more

What is Isotonic Solution?In isotonic solutions, both solutions have equal water potential.Water Concentration and Solute Concentration of a Cell in a Isotonic SolutionWater concentration and solute concentration are equal in both solutions.Effect of Isotonic Solution on Animal CellIf an animal cell such as red blood cell is placed into a isotonic solution, amount of water … Read more

What is Hypotonic Solution?Hypotonic solution is the solution that has higher water potential than the other solution.Water Concentration and Solute Concentration of a Cell in a Hypotonic SolutionWater concentration: Water concentration inside the cell is lower than outside the cell.Solute Concentration: Solute concentration inside the cell is higher than outside the cell.Effect of Hypotonic Solution … Read more