Movement of Substances across a Plasma Membrane

3.4.2 The Movement of Substances Across the Plasma Membrane in Everyday Life (Structured Question 1 & 2)

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

3.4.1 The Movement of Substances Across the Plasma Membrane (Structured Question 1 & 2)

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 R Carrier protein, with letter S [2 marks] (b) State two characteristics of the phospholipid bilayer. [2 marks] (c) Name the process of the movement … Read more

3.2.3 Types of Solution – Hypertonic

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 Solution Water concentration: Water concentration inside the cell is higher than outside the cell. Solute Concentration: Solute concentration inside the cell is lower than outside the … Read more

3.2.1 Types of Solution – Hypotonic

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 Solution Water concentration: Water concentration inside the cell is lower than outside the cell. Solute Concentration: Solute concentration inside the cell is higher than outside the … Read more