Question

Which is correct about an alpha helix that passes through a membrane?

A. It has all hydrophilic side chains

B. It will have a lot of hydrophobic side chains

C. The inside of the alpha helix is where water and other solutes can pass through

D. The helix itself is stabilized directly by interactions of the side chains with each other

Answer 1

Apha helix - knwown as motif which is common in the secondary structure of proteins and leads to right hand helix cinfirmation in N-H hydrogen bonds to the C=O group of amino acids present in four residues with the protein sequence.

Answer is B -it will have a lot of Hydrophobic side chains

Apha helix are coiled coil which are consider as highly stable forms where two or more helices are wrapped around each other as they are present in supercoil structure.As these hydrophhobic residues are completely packed together in the interior of the helix bundle.