The term 'HALF OF A GENETIC MOLECULE' can be solved by the crossword solution 'HELIX' (5 letters). A HELIX is a type of molecular structure that is found in many biological molecules, including DNA and RNA. It is a spiral-shaped molecule composed of two strands that wrap around each other. The two strands are held together by hydrogen bonds, forming a double HELIX. This double HELIX structure is the basis of genetic information storage and transmission.