Cells And Proteins- Membrane proteins

Question 1

How are integral membrane proteins held in the phospholipid bilayer?

Answer 1

Regions of hydrophobic R groups allows strong hydrophobic reactions

Question 2

What are some integral proteins?

Answer 2

Transmembrane proteins

Question 3

Describe the structure of peripheral membranes

Answer 3

They have hydrophilic R groups on their surface and are bound to the surface of membranes, mainly by ionic and hydrogen bond interactions

Question 4

What does the phospholipid bilayer act as a barrier to?

Answer 4

Ions and most uncharged polar molecules

Question 5

What molecules can pass through the bilayer by simple diffusion

Answer 5

Small molecules, such as oxygen and carbon dioxide

Question 6

How are specialised functions performed?

Answer 6

Different cell types have different channel and transporter proteins

Question 7

What be I transporter proteins do?

Answer 7

Bind to the specific substance to be transported and undergo a conformational change to transfer the solute across the membrane