Bio Chap 7

Which statements about the fluid mosaic structure of a membrane are correct?

The diverse proteins found in and attached to membranes perform many important functions. The framework of a membrane is a bilayer of phospholipids with their hydrophilic heads facing the aqueous environment inside and outside of the cell and their hydrophobic tails clustered in the center. Because membranes are fluid, membrane proteins and phospholipids can drift about in the membrane.

In this diagram of the plasma membranes of two adjoining cells, identify the protein indicated by the white arrow, including its function

a receptor protein that binds with a signaling molecule and relays the message into the cell by activating other molecules inside the cell

Identify Structure A.

glycoprotein

Identify Structure D.

phospholipid bilayer of membrane

What is the function of Structure E?

stabilization of the phospholipids

Which of the following would be a factor that determines whether the molecule selectively enters the target cells?

the similarity of the drug molecule to other molecules that are transported into the target cells