Question

in the α helices of transmembrane proteins, the hydrophobic side chains face which direction? choose one: the outside of the membrane - spanning helix the inside of the membrane - spanning helix the external or lumenal side of the membrane the cytosolic side of the membrane

Explanation:

Trans - membrane proteins' α - helices have hydrophobic side chains that face the lipid - rich environment of the membrane. The outside of the membrane - spanning helix is in contact with the lipid bilayer, which is hydrophobic.

Answer:

the outside of the membrane - spanning helix