Question 2
- State three function of the plasma membrane.[3 marks]
- Describe briefly the direct transmission of communicable diseases. [5 marks]
Observation
Some candidates could not state the function of the plasma membrane. Many candidates could also not direct transmission of communicable diseases.
The expected answers are:
- Functions of the plasma membrane
- - It gives the cell its immunological identity/it improves the immune system of the cells.
- - it regulates the movement of materials/substances in and out of cell/semipermeable
- - protects the cell content
- - defines the outer limits of the cell
- Description of direct transmission of communicable diseases
The pathogens of diseases infect a healthy person, directly without an intermediate agent. It can take place by various means such as direct contact with the infected person, animal, or droplets.