Question

1. what is the difference between channel proteins and carrier proteins? 14. how do carbohydrates function in the cell membrane?

Explanation:

For question 13, channel proteins form pores for passive - transport of ions and small molecules, while carrier proteins bind to specific molecules and change shape to transport them across the membrane. For question 14, carbohydrates in the cell membrane are involved in cell - cell recognition, acting as markers for the immune system and also contribute to cell adhesion.

Answer:

1. Channel proteins form pores for passive transport; carrier proteins bind and change shape for transport.
2. They are involved in cell - cell recognition and adhesion.