The R groups of amino acids located on the surface of protein molecules in the interior of biological membranes are

Question

anonymous · Answer

a.	
polar.
	 b.	
hydrophilic.
	 c.	
hydrophobic.
	 d.	
electrically charged.
	 e.	
able to form disulfide bridges.

blues · Answer

The interior of lipid membranes, where this amino acid side group is located, is made of hydrocarbons. Hydrocarbons are hydrophobic - which is why they interact with each other, while the hydrophilic head groups interact with water, to form a membrane. Remember that like is energetically stable with like, and you should be able to figure out what kind of side chain sits in a hydrophobic environment.