3.1 Cellular functions

Question 1

Protein types (3)

Answer 1

1. Structural
2. Motor proteins
3. Binding proteins

Question 2

What are cell adhesion molecules (CAMs)?
CAMs are proteins.

Give three different types

Answer 2

Bind two proteins together. All CAMs are integral membrane proteins

Cadherins, integrins, selectins

Question 2

What are cadherins

Answer 2

• Glycoproteins that mediate calcium-dependent cell adhesion
• Often hold similar cell types together (eg. epithelial cells)
• Different cells usually have different cadherin type

Question 3

Integrins

Answer 3

• Two membrane-spanning chains (alpha, beta)
• Involved in communication with extracellular matrix
• Active when not crossed