Alpha Helix of a Protein Question!?

Question

is it a double helix?

part of a tertiary structure and is stabilized by disulfide bridges?

stabilized by hydrogen bonds and found in fibrous proteins?

found in some regions of globular proteins and stabilized by hydrophobic interactions?

complementary sequence to messenger RNA?

thanks for the help

Answer 1

Alpha helix is a common motif in the secondary structure of proteins (with the other being beta sheets). They are stabilized by hydrogen bounds. Yes, they are found in globular proteins (and most proteins in fact - if you look at a tertiary/quaternary protein structure and see a helix, then it has alpha helices).