Question

model 2 - the selectively permeable cell membrane
small nonpolar or small polar molecules
phospholipid
small surface protein
membrane - spanning protein
carbohydrate chain
glycoprotein
glycolipid
inside the cell
outside the cell

1. what two major types of biological molecules compose the majority of the cell membrane in model 2?
2. how many different protein molecules are found in model 2?
3. what types of molecules are shown moving across the membrane?
4. how does the concentration of the small molecules inside the cell compare to the outside of the cell?

Explanation:

Step1: Identify cell - membrane components

The two major types of biological molecules that compose the majority of the cell membrane are phospholipids and proteins.

Step2: Count protein types

There are three different protein molecules: small surface protein, membrane - spanning protein, and glycoprotein.

Step3: Determine moving molecules

Small nonpolar or small polar molecules are shown moving across the membrane.

Step4: Compare molecule concentrations

There are more small molecules outside the cell compared to inside.

Answer:

1. Phospholipids and proteins
2. Three
3. Small nonpolar or small polar molecules
4. There are more small molecules outside the cell.