Answer:

helix

Answer	Crossword Clue
HELIX	Path an electron may take moving in a constant magnetic field
HELIX	DNA shape
HELIX	Spiral

HELIX	Half of a genetic molecule
HELIX	See 11-Down
HELIX	DNA strand shape
HELIX	Roller coaster feature
HELIX	Double ... (DNA structure)
HELIX	Screw
HELIX	DNA half
HELIX	Coil

HELIX	DNA structure