Alph helix and Beta helix pleats?

This is quite simple. Using stoichiometry to keep track of units, simply take the number of amino acids in the particular alpha helix and multiply by 15 angstroms. This is the length the alpha helix...

A Helix is a cartilage piercing at the top of your ear.

because when sex happins the cell needs a partner

Helix is a genus of common snails

A double helix is two helixes.