Question

Why is it important that there are different types of proteins in plasma membranes for the transport of materials into and out of a cell?

a) To regulate protein synthesis
b) To ensure efficient transport of specific molecules
c) To facilitate cell communication
d) To provide structural support

Answer 1

Different types of proteins in plasma membranes are important for efficient transport, cell communication, and structural support.

Step-by-step explanation:

The presence of different types of proteins in plasma membranes is important for the transport of materials into and out of a cell for several reasons:

1. To ensure efficient transport of specific molecules: Different proteins have specific functions and structures that allow them to transport specific molecules across the cell membrane. For example, carrier proteins bind to substances and change shape to move the bound molecule from the cell's exterior to its interior.
2. To facilitate cell communication: Some proteins in the plasma membrane act as receptors and allow cells to communicate with each other by interacting with specific molecules or particles in the extracellular environment.
3. To provide structural support: Integral proteins that span the membrane provide structural support and stability to the cell membrane.